PDF malware analysis — malicious · 009a28071cd84063

MALICIOUS

PDF

10.0 KB Created: 2010-06-16 14:13:44 Authoring application: kb40TAZ6s6n3 (via J2kb76R6B)

MD5: 623d738a8671e38d76da545000574e13 SHA-1: 7d17646ce2c5baa9e8caddfb0fa9a7bdf989f889 SHA-256: 009a28071cd84063aa2e6694d2ad0e5fc68b2c2e0be8332fed8cc4593f4519b9

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS_EXPLOIT_CLUSTER. The JavaScript stream, named javascript_obj0007_000.js, is heavily obfuscated but contains eval() calls, indicating it's designed to execute arbitrary code. This pattern strongly suggests the PDF is a dropper intended to download and execute a malicious second-stage payload.

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` `b3bce849e8330b0a2f0776f9c9341154913dd75faf1c03b44c73b9ce7afe8a34`	pdf-javascript-stream	PDF /JS object 7 at offset 0x235	8162 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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