yea it is what u think . it is really threat ... some one attack your pc remotely ... the great think with it ...it is pdf file therefore the anti virus can not detected it .. but if u look closely you can see it is EXE file but the attacker change the binary to make it different
if you want to delete it easy way u can search about its name by windows search and than u can delete it with another file .DLL i think it is in system32
I HOPE THAT CAN HELP U
THANKS
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