PDF malware analysis — malicious · 16b04bb9eaeb5c6b

MALICIOUS

PDF

9.3 KB Created: 2010-05-15 23:48:29 Authoring application: dqQKXP (via eE0vxx4X)

MD5: a260ae10228e32fc644a94a37cff5910 SHA-1: 10821c0e8f05b777151d8a89942c0cdb0bdf4664 SHA-256: 16b04bb9eaeb5c6b73a2f056168642c3dc02c2ab39167a33f3a2055c8cc58ef9

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript that is heavily obfuscated and utilizes an eval() call, strongly indicating malicious intent. The JavaScript is designed to exploit a known PDF vulnerability, likely to download and execute a secondary payload. The ML classifier also flagged this PDF with a very high probability of being malicious.

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 (matched inside decoded stream)
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_obj0007_000.js` `8bd43744bcb82846e9104cd25e786de87ae022e3527364a31d74f7d38cbfed45`	pdf-javascript-stream	PDF /JS object 7 at offset 0x242	8078 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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