PDF malware analysis — malicious · 40f5258d33ba661d

MALICIOUS

PDF

302.3 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057

MD5: fbfdca61bad8d93d71981dc41c78d211 SHA-1: 7653b3713a724d689629f1355a8b191801fa9cf7 SHA-256: 40f5258d33ba661d83b94ac7fede8ccc6a12523158e346bee15df5e6f95d695b

154 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript and a Flash object, indicating an attempt to exploit vulnerabilities. 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. The embedded Flash object and secondary PDF suggest a multi-stage attack designed to download and execute further malicious content.

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` `f30a754153ec4fca6ea9fb770704c65d16bb94933b633b8d6ec5725c761d79c6`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xB4F	772 bytes
`polyglot_child_pdf_off0004a0ca.pdf` `9c968719a1347b357cf7514d717853adf43c6c9b34496057e91e9dfdb38a41ed`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x4A0CA	6297 bytes

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