Black Propaganda

"Black propaganda goes beyond hiding the identity of the source of the message to falsely attributing it to a different entity, such as attributing an inflammatory message to a hostile source in order to stir up hate against the source, or cause it to lose credibility, or goad it into doing something of benefit to the propagandist. Black propaganda inevitably involves lying and dishonesty".

Source: https://www.forbes.com/councils/forbesagencycouncil/2023/02/13/white-gray-and-black-propaganda-a-business-owners-guide/