PDF malware analysis — malicious · 064db9f7a3a4480f

MALICIOUS

PDF

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

MD5: 6cff3f6da1e7e345764898e2d6941d8b SHA-1: b30547beb62b39f129101ef5e79e4adf5ff473ec SHA-256: 064db9f7a3a4480f05976f87c455b2ab8449096cc3a8446dad9cefb3101b84f5

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heavily obfuscated JavaScript that utilizes eval() calls, indicating an attempt to hide malicious code. The heuristics confirm this is a PDF JavaScript exploit cluster. The script's primary function appears to be downloading and executing a second-stage payload, as suggested by the obfuscated string concatenation and eval usage. The specific payload or its destination is not directly discernible due to the obfuscation, but the overall pattern is consistent with a malicious dropper.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `83e207e23c64c05abc40c4b97be5421647dd2f26fdb21a449f3c2387745f7fb8`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	12779 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `d93ee18eed6ea1aa22a0861b6c6dfc060ff32ceea916d067ab3aeb29f0513a06`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	13485 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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