PDF malware analysis — malicious · 6b384c69d009b6c1

MALICIOUS

PDF

9.4 KB Created: 2010-06-05 11:00:11 Authoring application: ucIOUDbibaMdIdEoa (via AmmEmvpVzivEgLZbvULkOC)

MD5: e9edff77fe298a47e4be2331bf2ad77e SHA-1: 281cca31d06dce5d7cb64e61acbb8ef0047cb9cd SHA-256: 6b384c69d009b6c1dc143f443f270fa67ee886c7be4bfbdb63129decd2abdea8

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF containing obfuscated JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. The JavaScript is designed to exploit a known PDF vulnerability, likely to download and execute a secondary payload. The ClamAV detection name 'Pdf.Exploit.Agent-35572' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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` `228ecbfeb36d18c23c58044ad78337247e55ee7ff1aa330d981e90449f9701a1`	pdf-javascript-stream	PDF /JS object 7 at offset 0x4C1	7586 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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