Millions of pages infected with malware

More than 640,000 Web sites and about 5.8 million pages are infected with malware, according to Dasient, which was founded by former Googlers to offer services to help Web sites stay malware-free and off blacklists.

That figure for infected pages is nearly double what Microsoft estimated in a report in April.

Meanwhile, the Google blacklist of malware infected sites has more than doubled in the last year, registering as many as 40,000 new sites in one week.

Dasient identified more than 52,000 Web-based malware infections, bringing the total to more than 72,000 unique infections logged by the company since it launched its malware analysis platform early this year.