Here are a couple things to try in the future if you find a suspicious file. Basically Virustotal will scan the file with ~50 AV programs and you can compare the results.
http://www.virustotal.com/

CWSandbox runs the application on their servers and give you a report on what files are created and where. By creating the appropriate sandboxed Windows environment, anything from infected Office documents to malicious URLs or scripts in Flash ads can be analyzed.

Sample Report: http://mwanalysis.org/?site=1&page=samplereport
Info: http://www.sunbeltsoftware.com/Malwa...elt-CWSandbox/
Submit: http://www.sunbeltsecurity.com/Submi...553671CBFD2360