PDF malware analysis — malicious · 19756ba05aedff47

MALICIOUS

PDF

22.0 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)

MD5: c5989559cf9a0ae5a6b36cda15aa2d7e SHA-1: fe4c9e67f64587da78ba34465acc4b43e7dbfd12 SHA-256: 19756ba05aedff474d72eebb6b984a65678b60584af9ee7c358abc7ccd6f0cc7

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes eval() to execute obfuscated code. This JavaScript is designed to download and execute a secondary payload, as indicated by the 'PDF_JS_EXPLOIT_CLUSTER' and 'PDF_EVAL' heuristic firings. The obfuscation and use of eval() are common techniques for malware to evade static analysis and deliver its malicious functionality.

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_obj0007_000.js` `13350bf4752f0c896080fd5978021f83201ca15cabf162d5a825e1654bfab782`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	21360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `6f6739ee8a83f73e346385c3a8badbc4abd4da095040f036ea0de1400b87e2a4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	482 bytes

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