PDF malware analysis — malicious · 2816ac0be5e84b36

MALICIOUS

PDF

9.2 KB Created: 2009-06-30 14:39:56 Authoring application: FaHOhWFwRsnuxZqDg (via aJrKlKcqFEmXUESQwUaN)

MD5: a70f76fb0eb196fed6a00a0a626e7ec5 SHA-1: 243131adef9bdaf5ce9cf9529f5d699899df430e SHA-256: 2816ac0be5e84b3671633181cc136508d8c309e641786f113d8e10f4660dbb92

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically identified as Pdf.Dropper.Agent-7241797-0. It contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, which is likely responsible for executing a secondary payload. The ML_NYX_PDF_MALICIOUS heuristic with a high score further supports the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7241797-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7241797-0
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` `e5e69843142f508c6b6cdaf30a8786e4f3e7a9f502027cd0185921120b1cf6f2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x47A	7483 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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