McAfee released a study that indicates the domains that tend to be the most dangerous or malware-prone on the Web, and at the top of the list is the Hong Kong (.hk) domain. The McAfee Mal Web report, which serves as a safety guidebook to risky online neighborhoods, reveals that 19.2 percent of all Web sites ending with the .hk domain pose a security threat to Web users, followed by China (.cn), the Philippines (.ph), Romania (.ro) and Russia (.ru).