Alternatively, the A320 was parked, and the Mi8 hover-taxied into the back of it from the 7 o'clock
Could be. But, it appears that the damage happened in the air ...
ASN Aircraft accident Airbus A320-232 YK-AKF Duma
Looks like a rotor strike on that vert fin of the Airbus.
With that damage, nice job getting her down.