PDF malware analysis — malicious · 4f75cd7ca8196160

MALICIOUS

PDF

76.2 KB Created: 2010-03-10 07:18:30 Authoring application: iMDVT8mLH (via bnzgJS2W)

MD5: 28944c5e03d4da4ef3e4fa0ede6cef28 SHA-1: c72c514d6d8e428e2b0d145501cb2759063686b6 SHA-256: 4f75cd7ca8196160a1585a02eb0f8d382803e37041c7536238cc7d924b052ddc

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

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 use of eval() for obfuscated code execution. A large JavaScript file was extracted, which likely contains the malicious payload. The exact intent of the script is unclear due to potential obfuscation, but its presence strongly suggests malicious activity.

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` `671deba1030d97f8d27f640259c5f56c5c1867eb9529a91dd0deaa96bf74b855`	pdf-javascript-stream	PDF /JS object 7 at offset 0x241	76768 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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