Cybercriminals continue to rely on their victims’ naivety and inattention in order to trick them into imperiling their data. The malware spreading mechanism is simple and classic: an email announces the release of a new free antivirus, which can be downloaded from an apparently legitimate software-buying site. When the user is redirected to the malware distribution Web page, the browser window automatically minimizes and a warning message is displayed at the same time. This message notifies the user about several alleged computer infections and points out the necessity of installing a security solution.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/fake-antivirus-will-not-disinfect-your-computer/