If it is an Indala and the coupling is half decent, you should get a UID with a fixed length and not something that looks like noise (bunch of 0s and Fs), with this or that hex digit that changes from one read to the next. And when the coupling is perfect, no hex digit change - that’s how you know the coupling is good in fact.
This looks too much like noise. Either the coupling is exceptionally bad, or it’s not an Indala. I couldn’t tell you much more from the other side of the internet sadly. Sorry 
Also, if your tag has a HF side, you could confirm it with a cellphone and TagInfo. Maybe it’s just not used in this particular system.