PDF malware analysis — malicious · 4ffe9a8c230064d8

MALICIOUS

PDF

57.6 KB Created: 2010-03-13 21:18:45 Authoring application: coJTIIODjk (via wqEVWrW)

MD5: d5074e8d36f28d532ad3eaed8b0f315d SHA-1: feea30c2febf29669326202429b8ee73a224ea40 SHA-256: 4ffe9a8c230064d81d621204a82af03591e97c980ffca5037ad608739546d34f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The high-severity PDF_EVAL firing suggests the script uses eval() for obfuscation or execution. A suspicious JavaScript file, 'javascript_obj0007_000.js', was extracted. The script's purpose is likely to download and execute a second-stage payload, though its exact functionality is obscured by obfuscation.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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_obj0007_000.js` `68e2b3fd6d57673c19a1099fdd7ad685c9ac5b610c0390747ccb2adeb514bfc3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x239	57795 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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