See: http://urlquery.net/report.php?id=2092872
See these search query results: http://www.google.nl/search?output=search&sclient=psy-ab&q=pmwipcfpwtqpzfco.mynumber.org&btnK=
This random pseudodomain formation was already documented by our forum website analyst, !Donovan, at his WAR blog.
Another analysis can be found here:
http://blog.unmaskparasites.com/2012/06/22/runforestrun-and-pseudo-random-domains/
The common security hole here is named PLESK

polonus