PDF malware analysis — malicious · cf3c7f8591be76f4

MALICIOUS

PDF

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

MD5: 3d683410170913530085d4c751b651ae SHA-1: 482f48c7c49024d5ce8c65920f09653077eadba8 SHA-256: cf3c7f8591be76f4cf14c00b290e639ed3cc00e4adcafea84810d9feb8689eb7

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation and utilizes eval() and String.fromCharCode() functions, suggesting an attempt to hide malicious code. This obfuscated script is likely designed to download and execute a secondary payload, a common technique for initial access or further system compromise. The high confidence in the PDF_EVAL firing supports this assessment.

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` `3d8ad0bc84f018b81b340a9b60701b0597491bb1149113edbf182f561ca4e650`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC5	8803 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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