Depending on which forum you frequent, the contents of the .rar file change. This is a classic sign of (creepypasta). Common theories include:
: Many believe it was an early attempt at an ARG that lost its hosting platform, leaving only the cryptic filename behind as a ghost in the machine. Why Does It Persist?
The Digital Abyss: Unpacking the Mystery of "Fears.of.Glasses.o-o.World.War.rar"