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Remove Calendar virus (Free Guide) - Removal Instructions

removal by Julie Splinters - - | Type: Mac viruses

Calendar virus is a term used describe persistent notifications that stem from malicious domains

Calendar virus
Calendar virus is the threat that affects iPhone devices and infiltrates applications with shady events and entries triggering notification pop-ups and redirect.

Calendar virus is a campaign developed by threat actors that inserts fake alerts into the calendar, and users are prompted to visit deceptive websites. These questionable entries appear seemingly out of nowhere, and, because a legitimate application is used to display them, users sometimes start clicking on the links provided inside, which can lead to malicious sites. The Calendar virus notifications incline that gifts are available to pick up, malware-infested the phone or simple promotional messages. As a result, users might infect their devices with malware or accidentally subscribe to useless services.

In most cases, users believe that the activity Calendar virus is related to malware, although it is not the case. In most cases, deceptive techniques (phishing email, fake alerts on suspicious sites, etc.) are used in order to add a calendar entry on iPhone or Android, or a malicious profile into these devices. Thus, the only way to get rid of these persistent Calendar spam messages is by deleting these entries. Remember, URLs like or should never be trusted.

Name Calendar virus
Type Scam/ Mac malware[1] 
Associated Mobile calendar applications, services
Symptoms The device becomes slower and questionable calendar entries, events get scheduled on the mobile applications out of nowhere and triggers redirects to advertising services, commercial pages, pop-ups or banners with questionable material
Damage Deceptive sites and pop-up notifications expose the user to possibly malicious content and can trigger direct downloads of PUPs or malware on the machine. Also, online advertisers can access, track, collect and sell information about your online browsing habits 
Distribution The scam is spreading around the same deceptive advertising sites that trigger redirects, show advertisements, and so on
Elimination To get rid of Calendar virus, you will have to access its settings and get rid of the event that was added without permission; additionally, if you clicked on links, make sure you scan your device with anti-malware software
Repair For better performance of the device, as well as termination of junk files and leftovers of malware, scan it with Reimage Reimage Cleaner Intego

Calendar virus may appear on many devices, including Windows/macOS desktop machines, as well as iPhone and Android phones. Users say[2] that they have been infected with iPhone Calendar virus and question the security of their devices because such alerts may seem either dangerous or related to malware.

Variations of Calendar virus include messages like You Have Won iPhone X Max from AppleStore or Your iPhone Xs Max is ready for PickUp that come from various websites, including:

In fact, There are tons of different domains that can cause these changes in the calendar. Anything that happens on your device without permission should be taken seriously, although many would like to remover Calendar virus just because of its intrusive nature.

Calendar virus is (usually) Apple devices targeting campaign that focuses on deceptive advertisements and push notifications that trigger clicks and permissions, so events can be added on the calendar applications. When people start seeing these entries and other intrusive content it becomes a difficult process trying to decline, delete them or close additional pop-ups and notifications that appear after a redirect or click on the provided hyperlink. 

The event is automatically added to the calendar, and once the date arrives you get a notification about it. Pop-up notifications come to your screen repeatedly, tricking you into clicking on them and visiting sites or confirming something. You shouldn't fall for Calendar virus scam, as, if you click on the links and insert your personal information, you may infect your device with malicious software or suffer significant monetary losses.

Interacting with spam can lead to many scenarios. Worst of them could be phishing site redirects,[3] techniques triggering sensitive data collection, or spying malware. If you got exposed to any material regarding advertising pages, software promotions, and other misleading content, try to remove the Calendar virus by exiting those web browser windows and checking the system for malware traces.

  iPhone Calendar virus
Calendar virus is the scam campaign that makes fake calendar entries with deceptive claims about iPhones you won or possible malware risks to attract your attention.

Calendar virus can trigger many push notifications and raise questions this way. Also, constant calendar invites, deals, and sales from users that you don't recognize are spam. iCloud calendar application and other apps can automatically notify you about every notification, and spammers misuse this feature for their advantage. 

Unfortunately, there is no particular solution for the issue, and there are many versions of the same Calendar notifications virus. You cannot mark those invites as spam or prevent them from people that are not in your contacts, but invites can be declined, and users may respond negatively to them. You can get this threat by responding to a scammy email too, when all the buttons stating Allow or Block trigger the same notifications. 

Pop-up notifications lead to redirects, to shady or malicious pages and false calendar events. Then you are left with a hard question and a few methods for Calendar virus removal. Since this is a threat that managed to change calendar preferences it can also manage to change settings of your machine, add files, programs, or disable some features. You need to take that into consideration and make sure to remove all potential risks of getting these intrusive symptoms repeated.

Calendar virus is based on tactics and symptoms of potentially unwanted programs, so to get rid of the malware itself and possibly associated programs and intruders, you should go for the anti-malware scan on the affected machine and search for potential intruders. This way, you can terminate the adware that triggers additional intrusive behavior, and pop-ups, redirects with commercial material.

However, Calendar virus adds events with links to shady sites that can trigger installations of shady or rogue software by claiming that your device is affected by malware or is potentially exposed to viruses. Deceptive events and other entries lead to tons of insecure sites, and none of these links should be opened. There are many different infections and techniques that can get used directly on the website to collect information about your online browsing habits or record keystrokes directly on targeted domains. 

Calendar spam

Malicious domains connected to Calendar virus scam

Multiple domains could be used to deliver suspicious notifications directly to users' screens. These persistent messages use social engineering in order to make users click on the link and then proceed with whatever crooks intended them to.

Regardless of techniques, all of Calendar virus developers seek only one goal, which is money – be it valuable personal information that could be sold for marketing purposes, installation of unwanted programs that third-parties get a commission on, or user exposure to intrusive ads. Below are the most commonly encountered domains that actively distribute calendar virus. is one of the most active addresses that are used to deliver Calendar event spam to victims. In most of the cases, users visit websites of poor reputation that provide some type of useful functionality, such as TV show streaming, online gaming, porn videos, etc. These sites are usually filled with intrusive ads that may pop-up seemingly out of nowhere, just at the time when users tap on their screens. As a result, they start seeing notifications from

Calendar virus prompts from are geo-location-based so that users might see phishing messages in their native language – this is very typical to ad content. Typically, the content of notifications includes messages from alleged secret lover, threatening messages that claim phone vulnerability, claims about malware infections, etc., so users may see Calendar entries like “Kate sent you (5) pictures,” “You are exposed online,” “Clear your iPhone from malicious attacks!,”Viruses alert – check protection NOW,” etc. As evident, you should remove pop-ups instead of clicking on links inside these scam notifications. is another domain that infiltrates iPhones with intrusive Calendar spam. Just as with other similar scams, intrusion happens either when users accept a calendar invitation via a phishing email or when they accidentally click on a link steaming from a malicious website.

Once the Calendar virus entry is established, users start receiving pop-ups via their phones of various content. In most cases, threat actors behind this scam use fake messages in order to intimidate users and make them download unknown applications, provide personal information by registering to some allegedly useful service, or visit websites of dubious content.

In any case, you should not click on pop-up messages that read:

  • Viruses on your iPhone?! CLEAN THEM NOW
  • Ensure Your Online Protection, Click Now!
  • Who wants a Free Apple Music Subscription?
  • Your Phone is not Protected! Click to protect, etc.

Calendar virus notifications
Typically, crooks use domains like and to deliver intrusive pop-ups to users

Scams get more and more stealthy

Junk email notifications include invitations or additional pop-ups with Accept or Decline buttons. Unfortunately, no matter which button you click they all trigger the same function. In some cases, such deceptive material leads to other push notification redirects, or you encounter direct pop-ups on the desktop from there, install the PUP, or a virus without noticing.

Experts[4] note that this interaction may also be needed for a scammer to make sure that your email address is active and can be targeted more with scammy messages and malware-laced content. You should simply delete the received email that raises questions or is suspicious due to content or the initial sender. This is probably the best way to avoid spam campaigns and exposure to these shady services and online material.

Also, those redirects, sites with false messages about malware infections, other risks, lotteries, prizes, and so on are symptoms of the potentially unwanted program or the adware-type intruder. This application is the one that triggers redirects and the constant appearance of shady websites with questionable content.

PUPs spread around during freeware installations when the person who downloads wanted software chooses recommended or quick options and automatically allows all the intruders to come on the device. You need to choose Advanced or Custom installations and, more importantly, rely on official developers and application providers to avoid this pre-bundling in the first place.

Get rid of any potentially unwanted programs that can trigger Calendar virus scam campaign

Since the Calendar virus is the threat affecting various parts of the device it can get pretty dangerous over time. You should clean the machine and eliminate the potentially unwanted program that triggered those unwanted calendar entries or can lead to additional issues with the system. There are tons of domains that trigger redirects to sponsored or affiliated pages and make these spam campaigns happen.

You should go to the Calendar application and tap Calendars at the bottom. You should locate all the suspicious calendars and tap the i in the circle to get more information and options. Scroll to the bottom, so you can press Delete Calendar. After that, you may need to block pop-ups on your browsers and clean, additionally installed extensions or tools. To do so, follow the Calendar virus removal guide below.

Remember that when you remove Calendar virus from the machine using manual methods, you still need to run the full system check using an anti-malware program or security tool to make sure that all parts of the suspicious program get cleaned and terminated. Rely on professional tools to avoid additional risks and danger of getting malware installed without even noticing.

You may remove virus damage with a help of Reimage Reimage Cleaner Intego. SpyHunter 5Combo Cleaner and Malwarebytes are recommended to detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove Calendar virus, follow these steps:

Get rid of Calendar from Mac OS X system

If somehow Calendar virus is related to adware or other PUPs, clean the machine to avoid issues

  1. If you are using OS X, click Go button at the top left of the screen and select Applications. Cick 'Go' and select 'Applications'
  2. Wait until you see Applications folder and look for Calendar or any other suspicious programs on it. Now right click on every of such entries and select Move to Trash. Click on every malicious entry and select 'Move to Trash'

Uninstall Calendar from Mozilla Firefox (FF)

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select Calendar and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  4. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete Calendar removal. Click on 'Reset Firefox' button for a couple of times

Delete Calendar from Google Chrome

Make sure to clear any suspicious installations from your web browsers, so PUPs cannot interfere with your device further

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select Calendar and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  4. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  5. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  6. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  7. Click Reset to confirm this action and complete Calendar removal. Click on 'Reset' button to complete your removal

Erase Calendar from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for Calendar or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  4. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete Calendar removal process. Select all options and click on 'Reset' button

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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