Noun
An evil doer; one who commits a crime; one subject to public prosecution and punishment; a criminal.
One who does wrong by injuring another, although not a criminal.
Source: Webster's dictionaryOf all evil-doers, the American is most to be feared. He uses more ingenuity in the planning of his projects and will take greater risks in carrying them out than any other malefactor on earth. Robert Barr (writer)
PROOF-READER, n. A malefactor who atones for making your writing nonsense by permitting the compositor to make it unintelligible. Ambrose Bierce
And Thade, "The Death Giver," is a murderous malefactor who spreads death for the sheer love of killing! Source: Internet
His creation of the Rings of Power, the subtle manipulation of Ar-Pharazôn, the gruesome fates he delivers his enemies — all these and more designate him a typical Malefactor. Source: Internet
Now Alastor, the malefactor, has reawakened and is intent on destroying the Redding fortune, unless they can kill him in the body he inhabits, which, oh, wait, that's Prosper, and why is his grandmother coming at him with a silver blade? Source: Internet