I wonder a bit why someone would store private keys in hex format which is a rather error prone format. But it seems OP also only guessed it should be private keys, because... well... at least the size matches, 64 hex chars equals 32 bytes equals 256 bits.

Could be entropy, too, but maybe less likely. If it's not documented what those numbers are, then good luck.


Why did you start with Bitcoin Core v25.2, any specific reason? Use https://bitcoincore.org and not https://bitcoin.org for downloading Bitcoin Core. Always verify your download to be genuine!

Good suggestions so far here from others. I'll emphasize that you need to work in a safe and preferably offline environment when you fiddle around with "naked" private keys and tools to convert them in more suitable formats. Don't do that on an online and hot machine which also could be used for daily internet shit.