PDF malware analysis — malicious · 00c9818cbe25b3b7

MALICIOUS

PDF

556.1 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057

MD5: fb0a7e76dbc0a0eef14d2bb7408ee017 SHA-1: 72713b62ada26565067e787b959cc690fda6c7eb SHA-256: 00c9818cbe25b3b737bb801c31f49a5be1543d7f5df891986328721a196b215c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and a Flash object, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. A secondary embedded PDF was also detected, which itself contained suspicious findings including JavaScript and embedded files. The ML classifier strongly flagged this PDF as malicious. While the embedded URL is benign, the presence of multiple embedded malicious components suggests an attempt to exploit vulnerabilities or deliver further malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://adobe.com/AS3/2006/builtin

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`pushpro.swf` `072d8faed3d578db2745f8140d283532f597a6cc5d3b91bbdd9b52f1c96ccfa8`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x13F3	772 bytes
`polyglot_child_pdf_off000897a1.pdf` `fce06f3f190492d9653209928d5009032ec3fbc8e14ea08dc2e0eaa9fb89f7f5`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x897A1	6297 bytes

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