PDF malware analysis — malicious · 12cf9e996d6c1fcb

MALICIOUS

PDF

7.2 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7e01a174beb39410e48ff6f7d4658f70 SHA-1: 19813832101afd8c129d58ec80866d72d1a81cad SHA-256: 12cf9e996d6c1fcbed74a586e5306341a81b0f4cca4c2e620700bfa9110c0d18

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes an eval() call, a common technique for obfuscating malicious code. This script is identified as a PDF JavaScript exploit cluster, strongly indicating its purpose is to execute arbitrary code. The primary function of the script appears to be downloading and executing a secondary payload, as suggested by the heuristic firings and the nature of the embedded JavaScript.

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
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_obj0013_001.js` `ab64e32dddb342eee3e20fd389aee7f63eb807112b44f998b670ddfa911aa15f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38B	5803 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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