1995–2000; respelling (influenced by phreak) of fish (Source: dictionary.com)
Definitions of Phisher
verb (used without object)
to try to obtain financial or other confidential information from Internet users, typically by sending an email that looks as if it is from a legitimate organization, usually a financial institution, but contains a link to a fake website that replicates the real one.
verb (used with object)
to make (someone) a victim in this way:
: a scam by which an Internet user is duped (as by a deceptive e-mail message) into revealing personal or confidential information which the scammer can use illicitly