Originally Posted by DaleDe
A compressed file can easily lead to false virus checking, due to the compression itself. To really check for a trojan virus you need to check the executable itself. Uncompress the file and then perform the check.
AFAIK, there are several different compression methods for Windows executables and the average end user usually cannot uncompress them without knowing which one was used.
I simply found it a bit suspicious that someone would post a .rar archive with just an executable in it without source code and documentation as their first post.