PDF malware analysis — malicious · c1a3c2a5f7547bd1

MALICIOUS

PDF

27.7 KB

MD5: b505d3b74683896eb545c74cadce76b6 SHA-1: cdd696908cc68cf1c7cadb7ca4490e6ff3961e42 SHA-256: c1a3c2a5f7547bd1685d1cde48451d47d47502d264bf640a93cf67e34f80ea65

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and uses filters like ASCIIHexDecode and ASCII85Decode, which are often used to obfuscate malicious code. The ML classifier strongly indicates maliciousness. The presence of JavaScript actions and streams points to an attempt to execute arbitrary code, likely to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

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