PDF malware analysis — malicious · 630ee3deaed1d4b1

MALICIOUS

PDF

9.7 KB Created: 2009-04-24 23:58:18 Authoring application: HGPSR (via ViffCNs)

MD5: d6daceedc82a8520cff9e01082277328 SHA-1: 81c18b096f9a0c17506f14412818d2d6b426b1ee SHA-256: 630ee3deaed1d4b1020e7e9e9ff111cbd74d02350cf364ba2cd551704b839536

148 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 that utilizes eval() and appears to be obfuscated. Heuristics indicate this JavaScript is part of an exploit cluster targeting PDF vulnerabilities. The script likely downloads and executes a secondary payload, a common technique for initial access via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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` `6cb0cea271db5bdaa2bef547d3914242b5830f72812a544fe33d085b201912cc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x236	8364 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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