JS/SpaceStalk-A is a malicious Trojan that attempts to steal user information.
JS/SpaceStalk-A consists of a Quicktime movie component embedded in a web page victims browse. Using a feature of Quicktime movies, an Javascript embedded in the movie downloads another malicious Javascript (also detected as JS/SpaceStalk-A).
The downloaded Javascript harvests information about the victim viewing the page, and attempts to upload it via HTTP to a remove server.