PDF malware analysis — malicious · 2d5ef8696493ab6d

MALICIOUS

PDF

26.1 KB Created: 2011-72-51 03:25:00

MD5: dd6703d9651fed50ab7370ca8020bf58 SHA-1: 76c799cba4856410ace54b5a066eff4f91663ad1 SHA-256: 2d5ef8696493ab6dd39f0f8c9f4b9ed9ec26cee028d6ca8be991f0ee35406ee8

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A high-severity heuristic, PDF_EVAL, indicates the use of eval() for code execution, and an ML classifier strongly suggests maliciousness. The embedded JavaScript file, javascript_obj0001_000.js, is the primary artifact. The script likely downloads and executes a second-stage payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0001_000.js` `72feb68d8dd5b293dc97965d62741b20cdcc4508f65fb8a21c0a856e02e94125`	pdf-javascript-stream	PDF /JS object 1 at offset 0x63B2	938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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