What is a spear fishing cyber attack?

Answer 1

A spear phishing cyber attack is a targeted email scam where attackers impersonate someone the victim knows or trusts, like a coworker or company executive. Unlike regular phishing, which is sent to many people, spear phishing is personalized to trick one specific person into clicking a malicious link or sharing sensitive information like credentials or financial data.

Answer 2

It is a targeted phishing attack. See for example: http://www.fbi.gov/news/stories/2009/april/spearphishing_040109