PDF malware analysis — malicious · 06e8648f2b765b50

MALICIOUS

PDF

385.2 KB Created: 2010-03-08 18:08:53 Authoring application: PDF Editor - Foxit Software

MD5: b8970bcc41dfbc6f1b98354b3f3a23bc SHA-1: 175ae8a1e9e58ce6b676d5969f65cead0dc00c11 SHA-256: 06e8648f2b765b504f26b7e154388a25882fc91565664bdf6531d8cb721e1c3b

240 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and exploits for CVE-2009-4324 and CVE-2008-2992, indicating it's designed to execute arbitrary code. The JavaScript appears to be obfuscated and attempts to evaluate a large string, which is characteristic of downloaders or exploit loaders. The presence of a secondary embedded PDF with suspicious findings further supports a multi-stage attack.

Machine Learning

Nyx PDF Classifier clean score 0.2125

Heuristics 8

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
Secondary embedded PDF body has suspicious static findings high 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.
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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `66f9d67b08ee61fa0b21f0072b9934a745d388290758f18b651bf361947bedf5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18B	6603 bytes
`stream_002_off00038133.bin` `781e1d57bd8ffa5d8d8c977124f728039d12de673138f6cd53b2cf4cee608fa6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x38133	709500 bytes
`polyglot_child_pdf_off00038023.pdf` `3a702c3eecc75d8e530d914d0af0c75bdadf68c44ad8d50f3670274c421cb367`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x38023	165070 bytes

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