Exploitation will not show any signs. After the attacker will take control the code can have any effect.
Please let BitDefender disinfect your files and update your Flash to latest version.
Sorin Ciorceri, virus researcher
This SWF contains an actionscript to load another small swf file based on the Flash version detected. If a vulnerable version is detected then the corresponding exploit is executed. This will allow a remote attacker to download and execute arbitrary files on system.