PDF malware analysis — malicious · 2a2ffadc36f1408a

MALICIOUS

PDF

1.95 MB Created: 2009-04-01 17:49:41 Authoring application: zKDqnplxpPAyeTAef (via orTVEMpsMmvArzxZLwe)

MD5: c243ff235b3890aff55246c10d537ef7 SHA-1: ca979b9c86876a02934ad472cb742782bcc553c5 SHA-256: 2a2ffadc36f1408a7e539215a7ef3907d79b56171ae59054ed85b8c2b3e29e34

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, specifically identifying it as 'Pdf.Exploit.Agent-35572'. Static analysis revealed embedded JavaScript, indicated by multiple PDF-specific heuristic firings. The presence of an extracted JavaScript file, 'javascript_obj0007_000.js', suggests the document is designed to execute malicious code. The JavaScript's likely purpose is to download and execute a second-stage payload, contributing to the overall malicious intent of the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `30103b4260ef2b90027a78b22169679f29a40ff45a4f9ed090f73109063928f7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x44C	7440 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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