This tutorial will go over two sites that you may use in order to check sites for possible malware, while it’s not 100% it does help in order to protect your OS system from possible infection. Both links will be listed below for your own testing. This will give you a brief overview if the site has been listed for any possible suspicious activity & if so what pages are at fault.
McAfee http://www.siteadvisor.com
Google http://www.google.com/safebrowsing/diagnostic?site=Site_Name_Here.com
Have Fun & Enjoy.