It looks original to me... It has two independent charging circuits (needed for the 2 fast charging ports). You can clearly see the two coils, the ICs for Qualcomm QC2.0 and two output caps. The main input smoothing capacitor is properly rated. The clones usually have an easy construction with just one 5V regulator and the ports are all paralleled. Cheap Chinese rubbish don't usually have heat shrink tube on the coils.
The only thing that disturbs me is the LED on the back of the board. Is there a hole or a light guide for it?