PDF malware analysis — malicious · 76da429fc4ac0045

MALICIOUS

PDF

47.6 KB Created: 2011-04-18 15:20:20 +08:00 Authoring application: xyghPDF SDK 4.3 (via BCL easyPDF 4.30 (0615))

MD5: f7ed441b9059a893390ae53df4925d14 SHA-1: 322175865868643831651f38abc7195a787fd966 SHA-256: 76da429fc4ac0045de234b3c2f4fee01be46cca220d2ada1cff1fb72783be08e

202 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file contains embedded Flash content that exploits CVE-2011-0611, a known vulnerability in Adobe Flash Player. This exploit is designed to download and execute a secondary payload. The presence of multiple PDF-related heuristics, including embedded files and a flagged child PDF, further supports the malicious nature of this document. No document body text was available for analysis, but the exploit and embedded artifacts are sufficient for a high-confidence assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9817

Heuristics 7

Adobe Flash Player RichMedia exploit critical CVE likely CVE_2011_0611_FLASH_RICHMEDIA

PDF combines RichMedia Flash activation with an embedded AS3 SWF loader (ByteArray/loadBytes) and shellcode heap-spray staging. This is the static exploit shape associated with CVE-2011-0611 Flash content delivered through Adobe Reader.
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 (matched inside decoded stream)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 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.
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objstm_0026_00.bin` `0841ed6ca2149b386133777ff3868f6222ba5033d6f52cd654a117610818bd40`	pdf-objstm-decoded	PDF /ObjStm 26 0 obj (inflated)	1084 bytes
`polyglot_child_pdf_off0000a335.pdf` `4044524e0d63e7a8080f48c5c2ac2d90f174bca6a94b7529f245da6d43f70bcf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xA335	6976 bytes
`polyglot_child_pdf_off0000a688.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xA688	6125 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.