As ETFbitcoin already mentioned, the recovery software needs to know the type and structure of the file to recognize whether it is corrupted or not.
And this is not the case with an electrum-wallet-file without a file extension.
I'd also assume that your file is corrupted.
Do you still have the original drive where you have recovered it from ?
If so, you hopefully still have the
untouched original ? In case you do, create an image of this drive (which should always be done; never work on the original drive) and try out another recovery software.
The recovery process is strictly depending on the software used. A different software does produce different results.
Unfortunately, your only possibility is to recover that file without any corruption