If you’re ever received a file via email, instant messaging or the web that you think might be a virus, but can’t be sure, then here’s a site that will let you find out: Virus Total. It runs your file (which can be up to 10 MB) through several different virus scanners, including the big ones like McAfee and Norton as well as some of the less-known ones like Avast and NOD32. Because it uses so many sources, you can get several opinions about whether a file is a virus or not.
Most people only have one anti-virus program installed so this site is good for verifying the results of their own program, as no utility can be 100% perfect. The files can be uploaded using SSL, so that they’re encrypted, and you have the option of having the file sent to anti-virus vendors for analysis. It’s particularly good for Mac users who usually don’t have anti-virus software, but may want to check a file before sending it to a Windows-using friend for example.
Found via the F-Secure weblog.