Fake antivirus is a malware and one of the most frequently encountered and persistent threats on the web. This malware, with over half a million variants, uses social engineering to lure users onto infected websites with a technique called blackhat Search Engine Optimization.
When the fake antivirus is downloaded onto the user's pc, the software attempts to scare them into believing their system is infected with threats that do not really exist, and then push users to purchase services to clean up the non-existent threats. This fake antivirus will continue to send these annoying and intrusive alerts until a payment is made.
What's the risk?
The threat of fake antivirus is the risk to victims' personally information, which is extracted and exploited by the affiliate networks that publish this malware.