PDF malware analysis — malicious · 6c9aebfd33131140

MALICIOUS

PDF

9.3 KB Created: 2010-05-25 23:03:29 Authoring application: vpVhbXeQZCY5WX (via RNgC31aISlr)

MD5: 8778563b0f282f3c850362bff8e13d28 SHA-1: 1be9b07e16801c029fec6bbd3810d8e7856d5c66 SHA-256: 6c9aebfd33131140bd942836c0e2e8e84af99bd1e0d6ee8ba1b782fd0f1632ea

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that utilizes eval() for obfuscated code execution. This JavaScript is highly likely to download and execute a secondary payload, as indicated by the PDF_JS_EXPLOIT_CLUSTER heuristic. The ML classifier also strongly suggests maliciousness. No specific family could be identified due to the obfuscation.

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` `ee74ecf39e4a1c512b08ddb0c318be21b6501d2d35f10d526e48e06fd09b1a20`	pdf-javascript-stream	PDF /JS object 7 at offset 0x234	8099 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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