I just checked it out .. it has an <hahahahahaha> which loads index.php on a remote server. That script loads some hahahahahahahahahaha that appears to be looking for a virus, not installing one. It's very interesting. I'm too tired to figure it all out.
The full url to the script is:
http://www.achtungachtung.com/0023/index.php
edit: hahahahaha = i f r a m e