PDF malware analysis — malicious · 7e77adf9cb3f7a01

MALICIOUS

PDF

6.1 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: 6b184eaee3c48b75047ef9123a7ee6d9 SHA-1: 86e871a8e2dd25309a749a2244a66a60e04b0bb4 SHA-256: 7e77adf9cb3f7a01611055fac6b4049d908a16134f042388d22b85690298a828

176 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript streams that are heavily obfuscated. Heuristics indicate this JavaScript is part of an exploit cluster targeting a known PDF vulnerability (CVE-2009-0927). The script likely attempts to download and execute a second-stage payload, a common technique for malware delivery.

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.CVE_2009_0927-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
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` `21313617669f8b92af557b192702ac3068149bafee0109ec57aa4210c25bbff6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x352	4705 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `cddec7d98e3835717932f6ebc59f71b0c76c076f59e525475da8a7fb0c70468f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x372	5401 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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