PDF malware analysis — malicious · 0d85974dbee14c83

MALICIOUS

PDF

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

MD5: 9f8d12ae88f4468b8f98d42048c92452 SHA-1: 106c8a651e7acf709399006a80b769c1bad29ea4 SHA-256: 0d85974dbee14c83f3407115dc87401a842c63d74d483246da61560b80f847b9

148 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 uses eval() calls, indicating malicious intent. The ML classifier and PDF JavaScript exploit cluster heuristics strongly suggest this is an exploit attempting to execute arbitrary code. The script's primary function appears to be deobfuscation and execution of further malicious code, likely a downloader.

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_000.js` `ac58da778a245e2ebaca5d94af6ab8297e07263148c86f7f05f2ba9678cd9638`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	8391 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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