It seems that a second round of attacks are happening today at GoDaddy and infecting all kind of sites (Joomla, Wordress,etc). Looking at the modification dates on the files, they all happened May 1st (today) during the morning from 1 to 3/4 am.

GoDaddy hosted WordPress sites have been hacked... again. They have confirmed the issues.

Check out this post to get help if your WordPress site has been hijacked.

Another reason to get good WordPress hosting.