PDF malware analysis — malicious · c537f754daba3aa6

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: c0bfb6f97a5edbbee7ec77416d6bb919 SHA-1: 6fcd8588441292e0f8e95d70bad652c645f38704 SHA-256: c537f754daba3aa6490e48c254cdb4c45bed0ce1c397cbfcbf99a575c5368d73

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 'PDF_EVAL' firing specifically points to an 'eval()' call within the decoded JavaScript stream, which is a common technique for obfuscating malicious code. The presence of 'String.fromCharCode' further suggests code obfuscation. The extracted artifact 'javascript_obj0013_001.js' is likely the source of this obfuscated script. The overall intent appears to be the execution of this script, which is characteristic of a downloader or dropper malware.

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_obj0013_001.js` `4467d7f3defac1e1464d1bf492829b74f46b9b341c3c9ebf314ccf20e2a24498`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12499 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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