It is not the Door, but the hinges that creak as the door moves.
You can spray the pin hinges with a lubricant like WD-40 or Silicon spray.
For seriously creaking hinges, I recommend knocking out the pins, and giving them a light sanding, (220 grit sandpaper to get off rust and grime), then lightly oiling them with 3 in 1 oil, and tapping them back in place.
Good luck - and consider fixing it after Halloween if the creak is spooky enough!!