Fake anti-virus software (also known as scareware) continues to be a big problem. Malicious hackers create programs that pretend to be legitimate products, but are designed to frighten you into believing you have security problems with your computer (in the hope that youll pay up for a cure) Spam traps intercepted a wave of malicious emails claiming to be free 30 day trial of McAfee VirusScan (which is a legitimate product) The emails were sent overnight and Sophos detected the attached file as Mal/FakeAV-EI.”]
Source: https://grahamcluley.com/fake-antivirus-poses-free-mcafee-virusscan/