Rabulias
the Incomparably Shrewd and Clever
No, the adventure itself has never been available as a PDF. The basic rules included with the adventure in the D&D Starter Set is available on WotC's site: https://media.wizards.com/2020/dnd/downloads/dnd_starter_rulebook.pdfI was sure it used to be free on their site along with the pregens and small selection of monsters but I could be wrong.