Don't think it's fake.
ATM skimmers and manipulated parts are a huge issue here in Germany, and I think basically everywhere. In my town, there are reports every week of people trying to forge on ATMs in the biggest bank at a huge plaza. There are people and cameras everywhere and they still manage to place things on the ATM.
Most used tactic is that they place something over the money slot, so when money gets pushed out, it goes into the fake slot and doesn't come out. Person at the ATM then thinks the machine is broken and leaves or tries other ATM. Then a person who has been hanging around in the ATM rooms comes over, pretends to use the ATM and removes the fake slot with your money in it.
When using an ATM, I basically touch every important part (keyboard, card slot, money slot) to check if it is loose or feels "weird". Ignore when someone starts talking to you when getting money, they will try to distract you. Always standing as close to ATM as possible, use wallet or hand to cover hand when typing in pin. Put money back into wallet while still standing at ATM, not while walking away.