PDF malware analysis — malicious · 3508eeb769073467

MALICIOUS

PDF

5.1 KB Created: 2009-02-13 04:13:07 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a63fa88b7597fbfe67772ce68484a80b SHA-1: 66043aa30ed109fca516829d9b75d354cd64ece9 SHA-256: 3508eeb769073467ee9be0ddaf8ba542bbcc09a0171b2d029b24495632d976a4

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-30146 and a machine learning classifier assigned a high probability of maliciousness. An embedded JavaScript stream was extracted, which likely contains obfuscated code intended to exploit a vulnerability within the PDF reader. The presence of JavaScript actions and streams strongly suggests an attempt to execute arbitrary code upon opening the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-30146 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30146
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_000.js` `b14343ec45a831c79e620061d12f0fce9dbfbe3014cd052a450f92e72e786e62`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	5532 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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