Pdf.Dropper.Agent PDF malware analysis — malicious · 5cf46293624335e8

MALICIOUS

PDF

3.8 KB Created: 2008-09-07 22:47:39 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12; modified using iText 2.1.7 by 1T3XT)

MD5: 2e49e58d35ddae59cbbec6c2d7a9e668 SHA-1: 61a1b7ceca9c96fc0ad4605600723e38bd9e27e4 SHA-256: 5cf46293624335e8c7411e87921db9902259aa3924d78506e492b53b8f726602

176 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK

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

The file is a PDF containing obfuscated JavaScript, identified by multiple heuristics and ClamAV as a known dropper. The embedded JavaScript is designed to be executed, likely to download and run a second-stage payload, as indicated by the 'PDF JavaScript exploit cluster' and 'ML_NYX_PDF_MALICIOUS' firings. The ClamAV detection name 'Pdf.Dropper.Agent-7264193-0' further supports its role as a dropper.

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.Dropper.Agent-7264193-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7264193-0
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `a9f365f160105b85937024112a39a820013f5f5101447e0b78170671fada517d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x352	2272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `1f48a85d5b26cd480f146a2852a76f56d69f8406a97fbbe01c11e9f918b76add`	pdf-javascript-stream	PDF /JS object 13 at offset 0x372	2968 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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