PDF malware analysis — malicious · 432b9145f190f64d

MALICIOUS

PDF

5.9 KB Created: 2008-12-03 13:57:41 UTC

MD5: 590641eabf21add8513229e67e396698 SHA-1: 0c2d585d1ea659de021e018ebdfed90f95d55345 SHA-256: 432b9145f190f64d23ff54558f6968add77b4abf388f51eb54249e181c0d73f2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream, named 'javascript_obj0006_000.js', is suspicious due to obfuscation indicators. The use of eval() and String.fromCharCode suggests the script is attempting to dynamically construct and execute code, a common technique for exploiting vulnerabilities or downloading further malicious payloads. The lack of document body text means the specific lure cannot be determined, but the technical indicators point to a malicious script execution.

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. (matched inside decoded stream)
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_obj0006_000.js` `c816e1716109a8616681a641d08f814d7cf4a001b7c553d447258951dec71742`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB4	9658 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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