See >>> Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support
There are no true AntiVirus scanning products for iOS/iPadOS. Due to the sandboxed security architecture, an AV process is unable to scan the filesystem.
Providing that you have not attempted to jailbreak your device - or have bypassed protections by side-loading third-Apps (if you don’t know what this is, then don’t worry about it), then it is highly unlikely that your device will have been infected malware. Short of erasing the iPad in its entirety, there is very little that you can do retrospectively - other than to make independent contact with those to whom you believe the malicious email may have been forwarded.
However, there is one potential source of immediate issues with your iPad that you may need to check - this being for a vulnerability that is often exploited that gives the appearance of a malware infection. This involves your iPad/iPhone Calendar - the symptom being your Calendar appearing to have been populated with regular events that create unexpected alerts or warn of malware infection.
Calendar Infection
Whilst not a malware infection in the traditional sense, if this exploit is observed on your device, it is highly probable that you were manipulated (via a simple click on a website link) into “subscribing” an additional (unwanted) Calendar to your device - and this unexpected Calendar is exposing unwanted calendar events and sending you unexpected “adverts” or other warnings.
If you see this issue, you’ll need to check for what’s out of place...
iOS/iPadOS13 and earlier: Settings > Passwords and Accounts
iOS/iPadOS14: Settings > Calendar > Accounts
Look for an “account” that shouldn’t be in the list of accounts - as this will likely include the Calendar that contains all the unwanted events. When/if you find the suspect account, tap - then select Delete Account. This should resolve this specific problem in its entirety.
As with all computer systems, there are vulnerabilities and exploits to which you are potentially vulnerable...
Providing that your iPad or iPhone has been kept up-to-date with system software updates, you should not be overly concerned for your iPad being directly compromised by malware. For older devices, no longer benefiting from regular security updates, the risk of an unpatched vulnerability being exploited increases. Regardless of the installed version of iOS/iPadOS, there are useful mitigations that can be used to significantly reduce your exposure to risk.
If you have given your personal details to a malicious website, this may be the cause of attempted fraud. If necessary, change account passwords (including your AppleID Password) if you suspect that they may have been compromised. If you have cause to believe that your AppleID has been compromised, follow the advice outlined here:
If you think your Apple ID has been compromised - Apple Support
If you have exposed your Credit Card details, you may wish to contact the Card Issuer - who may cancel and reissue your Card as a precaution.
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