PDF malware analysis — malicious · 232973c994e0423a

MALICIOUS

PDF

7.6 KB Created: 2009-10-13 19:49:89 Authoring application: PDF Library 3.8.6 (via PDF Library 4.7.2)

MD5: a2416677048fd5be316c4772a13faddd SHA-1: df9dde437cbccff6bb625fbe95000f9a5c7183bd SHA-256: 232973c994e0423ae38de227566a43dcb51d6b4050c7c2321e55672fe654c418

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly suggests malicious intent. The presence of ASCIIHexDecode filter with exploit indicators further supports this. The embedded JavaScript file, 'javascript_obj0007_000.js', is likely responsible for downloading and executing a secondary payload, which is a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `b345f80a0f7f0b6196d60c34c6e0949423ef57fc39ffd5ab9bf463c313d79a45`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	36945 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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