PDF malware analysis — malicious · 2ef8807e27d64bc5

MALICIOUS

PDF

7.3 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: c47fba52e92c1fe6e35b5ccf999e2063 SHA-1: 3c07b4aec9bacb13b9a18c2a2a114d138058bb7b SHA-256: 2ef8807e27d64bc53affa4d58a825db74074caa6d507a2536cce511191ea5c75

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flags it as malicious. The embedded JavaScript appears to use string concatenation and eval() to construct and execute code, a common technique for downloading and running further malicious payloads. The reconstructed JavaScript string is a key indicator of this behavior.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `c82f77e42db27e2bbacf89d442e5153d4f3ede737f666d44c085a222e0c65a53`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3DA	5870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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