Any chance it was Phish Tank or Open DNS that did the rating?
Two weeks ago my web host's server was hacked. My web site was down for almost 48 hours. Afterwards unauthorized folders and files were discovered. There were some folders added to my web site. The folders and files appeared to be for a phishing scam for a financial institution in Brazil. Phish Tank, a subsidiary of Open DNS, is the source of the rating which is shared with other organizations. The unauthorized folders and files were quickly eliminated but not before one particular unauthorized web page was listed by Phish Tank.
It was actually a representative of Phish Tank that telephoned me and informed me about the hack and the phishing scam.
I am currently waiting for one piece of important information from my web host before requesting a change in rating.
EDIT - Here is the link to the Phish Tank listing which is the original source of the rating: