Because of Google's large market share in the Internet search engine business, hackers developed a vested interest in ensuring that their attacks are effective in poisoning Google results, according to software company Symantec.

"Google's breadth and speed of indexing also play a role," added Symantec, a company involved in providing security, storage and systems management solutions.

Symantec reported that search engine results poisoned with links to fake antivirus software have been a constant problem for Internet users. However, it is an effective way for cyber attackers to infect users' machines.