PM
text/x-perl
Magic Bytes
Offset: 0
65 76 61 6C 20 22 65 78 65 63 20 2F 75 73 72 2F 6C 6F 63 61 6C 2F 62 69 6E 2F 70 65 72 6C
The Perl Module (PM) format is a script file used by the Perl programming language, originally created by Larry Wall and maintained by the Perl Foundation. These files store reusable code, libraries, and packages that developers import into scripts to extend functionality or manage software projects. While typically safe as plain text, executing modules from unknown sources can pose security risks, as they contain active code that runs with the user's permissions.
Validation Code
How to validate .pm files in Python
Python
def is_pm(file_path: str) -> bool:
"""Check if file is a valid PM by magic bytes."""
signature = bytes([0x65, 0x76, 0x61, 0x6C, 0x20, 0x22, 0x65, 0x78, 0x65, 0x63, 0x20, 0x2F, 0x75, 0x73, 0x72, 0x2F, 0x6C, 0x6F, 0x63, 0x61, 0x6C, 0x2F, 0x62, 0x69, 0x6E, 0x2F, 0x70, 0x65, 0x72, 0x6C])
with open(file_path, "rb") as f:
return f.read(30) == signatureHow to validate .pm files in Node.js
Node.js
function isPM(buffer: Buffer): boolean {
const signature = Buffer.from([0x65, 0x76, 0x61, 0x6C, 0x20, 0x22, 0x65, 0x78, 0x65, 0x63, 0x20, 0x2F, 0x75, 0x73, 0x72, 0x2F, 0x6C, 0x6F, 0x63, 0x61, 0x6C, 0x2F, 0x62, 0x69, 0x6E, 0x2F, 0x70, 0x65, 0x72, 0x6C]);
return buffer.subarray(0, 30).equals(signature);
}
Go
func IsPM(data []byte) bool {
signature := []byte{0x65, 0x76, 0x61, 0x6C, 0x20, 0x22, 0x65, 0x78, 0x65, 0x63, 0x20, 0x2F, 0x75, 0x73, 0x72, 0x2F, 0x6C, 0x6F, 0x63, 0x61, 0x6C, 0x2F, 0x62, 0x69, 0x6E, 0x2F, 0x70, 0x65, 0x72, 0x6C}
if len(data) < 30 {
return false
}
return bytes.Equal(data[:30], signature)
}API Endpoint
GET
/api/v1/pm
curl https://filesignature.org/api/v1/pm