A spoof from the Dark Ages? If so, it backfired. It would be like writings from the Onion getting enshrined as history by the Smithsonian Institution. The Christian missionary to the Muslims that I knew, believes that some Jews fed gobbledygook to Mad Mo as a prank, but did not themselves write his book (he couldn’t have written it anyhow being illiterate — others took it as dictation from him).
Not a spoof as far as I know.