Curl-url-file-3a-2f-2f-2f | 500+ RECENT |

It looks like you've provided a string that appears to be an encoded or malformed version of something like curl-url-file:///.

So:
curl-url-file-3A-2F-2F-2F → curl-url-file-:/// curl-url-file-3A-2F-2F-2F

cURL: A powerful command-line tool used for transferring data across various network protocols. It looks like you've provided a string that

Attempt 4: Use encoded form in a script

# Encoded version of curl file:///etc/passwd
encoded="file%3A%2F%2F%2Fetc%2Fpasswd"
curl "$encoded"