Hex strings of SHA-256 hashes produce too many false positives

[1Hyena]

Take this for example:

31d51a69d5ca0407d279a2ece4b3eacd60610444359a0ad099931a516f163397

It is a SHA-256 hash represented as a hex string.

Common sense says it's gibberish. Yet too often are such hashes reported by nostril as real texts.