PDF malware analysis — malicious · 19be376e9579c6d9

MALICIOUS

PDF

14.6 KB Created: 2009-06-08 10:44:48 Authoring application: KhqHypSuiGwp (via hxpafWcxQfQVksHPgb)

MD5: c35ad79e45182a114ddf340954a9c30e SHA-1: 6b3ba0b45a7d1de28045fd2879bde1e373022eba SHA-256: 19be376e9579c6d9b785fd7c2c23e2e8c5c6feccbcd9636b049b2275209503c0

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious (Pdf.Exploit.Agent-35572). Heuristics indicate the presence of embedded JavaScript, which is often used to exploit vulnerabilities within the PDF reader. The ML classifier's high confidence score suggests a known exploit pattern. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, contributing to the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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` `29642b5e3b2b0c7f492763603a1e66828efe319f3c69873d5d4d12ad6791342b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x36D	13349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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