The fallacy of a false attribution occurs when an advocate appeals to an irrelevant, unqualified, unidentified, biased, or fabricated source in support of an argument.
A version of false attribution is where a fraudulent advocate goes so far as to fabricate a source, such as creating a fake website, in order to support a claim. For example, the “Levitt Institute” was a fake organisation created in 2009 solely for the purposes of (successfully) fooling the Australian media into reporting that Sydney was Australia’s most naive city. See also "Fake news".
A contextomy is a type of false attribution.
Another particular case of misattribution is the Matthew effect: a quotation is often attributed to someone more famous than the real author. This leads the quotation to be more famous, but the real author to be forgotten (see also: obliteration by incorporation).