So let the string stand: 3A-2F-2F-2F. It is a key without a lock, a question mark that is also an invitation. Fetch what you will; the file will fetch you back.

Based on the structure, this looks like a URI-encoded (Percent-Encoded) representation of a file path protocol: file = file 3A = : 2F = /

You will generally encounter variations of this string in three specific scenarios: 1. Input Validation and URL Normalization Errors