This is written in your readme:

BINGO! (In the rare case of finding some private key with balance):
Import the WIF into a fully synced Bitcoin Core node.
If not sure how to do that, contact me by email (japeralsoler@gmail.com) attaching the 'found.txt' file.


Do you think people are idiots?
You even without a twinge of conscience ask to send a file with the found private key to your email!
Maybe you can also get the key to the apartment where the money is?!