Based on Norton Safe Web32 data – Symantec technology that scans the Web looking for websites hosting malware – we’ve determined that 61% of malicious sites are actually regular Web sites that have been compromised and infected with malicious code.
It is interesting to note that Web sites hosting adult/pornographic content are not in the top five, but ranked tenth. The full list can be seen in figure 16.
Moreover, religious and ideological sites were found to have triple the average number of threats per infected site than adult/pornographic sites
. We hypothesize that this is because pornographic website owners already make money from the internet and, as a result, have a vested interest in keeping their sites malware-free – it’s not good for repeat business.