Decoding This file

Hello,
The file seems to be attached with other, for which is executable. I can not extract anything with just this one.
The intervention therefore requires a more in-depth research, which I must implement for 50 euros.
If this interests you, send me your confirmation in private, so that I can give you more details about this intervention.

Very important, I need a 100% original file, no editing must be done on it, at the risk that it is corrupted.