EFT attachments are usually sent as PDF’s.  Anytime a message with a “.htm” or “.html” attachment is received in one’s email, it is usually a fake lure.
 
Messages with these types of attachments often pass through security software and firewalls as there is no malicious code in the attachment.  Instead, they often contain code that instructs your computer to do tasks such as open ports or to silently download and run an executable from an unknown web location.  By the time security software detects an infection, it is too late.  The victimized computer is usually compromised.
 
The next time an EFT from an unrecognized email address is received with such attachments, don’t get curious and just delete it.  It will save you a lot of headaches and grief.