What types of files can attackers corrupt?
These files may include documents created with word processing software, spreadsheets, or image files.
After corrupting the file, an attacker may distribute it through email or post it to a website.
What problems can malicious files cause?
There are various types of malicious code, including viruses, worms, and Trojan horses.
However, the range of consequences varies even within these categories.
How can you protect yourself?
If you decide to open an email attachment, scan it for viruses first.
If you are getting the files from a supposedly secure site, look for a website certificate.
Many operating systems offer automatic updates.
Apply the highest level of security available that still gives you the functionality you need.
source: www.techworm.net