PDF malware analysis — malicious · 077149d11d161861

MALICIOUS

PDF

9.7 KB Created: 2010-05-20 04:59:59 Authoring application: BSQ3F2ncmwBXO (via nmkykGRsjk)

MD5: e36946c9e9028eed8df21de89454eae5 SHA-1: 1be36a125230b5e2e13e38214f8f7d7de5880fab SHA-256: 077149d11d1618611a5252a0961e2efd51723115c85a32b5b14609fa5179c8a3

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, which is heavily obfuscated and uses eval() calls, indicating malicious intent. The ML classifier strongly flags this PDF as malicious. The script's obfuscation and use of eval() suggest it is designed to download and execute a second-stage payload, a common technique for malware delivery.

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` `c763bfa53814becb9aa50227a94b76223e40a1526557e42b665c7f50203d2f02`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23A	8106 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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