PDF malware analysis — malicious · 4ab91c7293902a51

MALICIOUS

PDF

13.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a8d9fb66dfb6e683be04cb01d942ea16 SHA-1: ffaa87456d874023e26c02f5f3ebd75b9da1718f SHA-256: 4ab91c7293902a5115a17650cf4465088392d0943914f52abdeb8f324bdf1544

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0013_000.js', contains obfuscated code with an eval() call, suggesting it's designed to execute arbitrary commands. The primary intent appears to be downloading and executing a secondary payload from a remote source.

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_000.js` `7e7d0c9fe1ff2e92d04a5a33dff5a9d032694f9dbff866c13d50a0443cfb9fef`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	12457 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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