Eicar test file

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
http://de.wikipedia.org/wiki/Eicar_test_file
http://www.heise.de/security/dienste/emailcheck/demos/go.shtml?mail=eicar