PDF malware analysis — malicious · 7846de03211c3efe

MALICIOUS

PDF

14.5 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 32eadc9ce6662c304e67540325578386 SHA-1: 590ba1498306bc3c2d8cd9dd1537d9fdb22ae60c SHA-256: 7846de03211c3efe59481551268e6210f1f76c16118d3e0b8a827ed994da3f83

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, indicating malicious intent. The ClamAV detection 'Pdf.Exploit.Agent-36118' and the ML classifier strongly suggest this is an exploit. The JavaScript's primary function appears to be downloading and executing a second-stage payload, as evidenced by the obfuscated code and the 'eval' calls.

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-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj0013_000.js` `ebee0797010cd3c1b55b59bf76e83c652a5ef4390e8bcfdc25da3361ce42d06c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13282 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 13 long base64-like blob(s).
`javascript_obj0013_001.js` `ad7a4df2cf602fea0b0769072479bcf21c2c5bc3d9069fb3ebe43454ff091ba5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	13988 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 13 long base64-like blob(s).

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