Recipients are told that if they agree to the terms of the contract, then they should expect "payment on Friday for the first consignment."
Attached to the email is a password-protected ZIP file, contract_1.zip, which contains inside it a malicious program called contract_1.exe.
Running the program will install the Troj/Agent-LNW fake antivirus onto the victim's computer.
Clearly the hackers thought that password-protecting the ZIP file would help their attack waltz past the defenses users have in place to protect their email. Although some antivirus and anti-spam filters might have trouble dealing with this kind of disguise, others can handle it in their stride.
As always, users would be wise to remember that curiosity killed the cat -- and be extremely wary of opening unsolicited attachments sent to them out of the blue.
Graham Cluley is senior technology consultant at Sophos, and has been working in the computer security field since the early 1990s. When he's not updating his other blog on the Sophos website, you can find him on Twitter at @gcluley. Special to Dark Reading.