Antonym of hagiography

Is there a one word antonym of "hagiography"? A word which means "a piece of writing that paints a biography in the most negative light possible"?


hatchet job

is a written attack, often but not exclusively ad hominem, that emphasizes the poor quality of the object of the attack.

obloquy

is a fancy word for the same.

calumny

is the same with the expectation of falsehood. They all have the same notion of strong bias by the author that hagiography does.