In fact all the indications that it was a photoshop creation, point to the fact that an amateur created it.
But lets look at it your way for a second.
Let's suppose that everything that Polarik has pointed out as the results of a photoshop were in fact caused by a bad scanner, the resulting image has still been photo shopped, because the serial number has been cut from the image leaving a black background beneath first layer of the scanned image.
So telling me it hasn't been photo shopped when it has, is at least disingenuous.
Do you want to discuss the black box or the white spots around the type?
Aren't you being just a bit disingenuous?