PDF malware analysis — malicious · 0dd704e603e03936

MALICIOUS

PDF

35.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: 53cba9d3f1b2efcfe2fa3da5414cbf8d SHA-1: ea6744b36c67308e2e65cabed9c51909a9348765 SHA-256: 0dd704e603e039360f45cf02cbf07100e59a3fdc9e157c524a4f853a4885ee8d

248 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains heavily obfuscated JavaScript that utilizes eval() and unescape() functions, indicative of an exploit. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is designed to execute arbitrary code, likely downloading and running a second-stage payload, which is a common technique for PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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-14412 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-14412
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `fbab266f8491d4ccfe07d1fd9b2853630945c2d397cffdcce87538bf6f836d07`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `66b48cb8feecfeb73ee6932070278df0f8c1c956f32e0bd29b0ab72c305ddb02`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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