The best approach to all these documents is to assume they are created by smart, bored teenagers. If there are world leaders creating forgeries then we will never unravel them. But we have a chance with a Dan Rather level forgery, so we need check for those kinds of mistakes.
In other words, go over every artifact, dot, dash, font, word and sentence in detail. Try to find problems with the thing. If we can't, then assume it is real. So far, we have not done that with this document.
Whether the document is an authentic typed document or a fake typed document is another question entirely. But the picture is unquestionable of a real piece of paper with text on it.