Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffe866fc8d956bc…

MALICIOUS

PDF

384.9 KB Created: 2008-01-05 16:25:50 +01:00 Authoring application: LaTeX with hyperref package (via pdfeTeX-1.21a)
MD5: 8bd6ccc44c0c4a8099531156db9406a4 SHA-1: 331fc71e33b55e31ef16fa9011d7b55a7c5f59f2 SHA-256: 0ffe866fc8d956bc9caf9ac16887c7677c27b7397aeca2bc49451017d74bec95
272 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript and U3D content, triggering critical heuristics related to CVE-2011-2462 (U3D heap spray) and CVE-2009-3459 (U3D auto-activate). The embedded JavaScript is heavily obfuscated but appears to be a heap spray designed to facilitate exploitation. The ClamAV detection 'Pdf.Exploit.Agent-23992' further confirms its malicious nature. The primary attack vector is exploitation of Adobe Reader vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • Adobe Reader U3D parser exploit with JavaScript heap spray critical CVE likely CVE_2011_2462_U3D_HEAPSPRAY
    PDF combines U3D/3D annotation content with JavaScript heap-spray shellcode. Public CVE-2011-2462 exploit chains use a crafted U3D stream and JavaScript heap spray to control memory during Adobe Reader's U3D parser corruption.
  • Adobe Reader U3D auto-activated 3D annotation — CVE-2009-3459 critical CVE likely CVE_2009_3459_U3D_AUTOACTIVATE
    PDF contains a /Subtype /3D annotation that is configured to auto-activate on page view (/3DA <</A /PV /AIS /I>>) alongside a /U3D stream and JavaScript. This is the document shape used by CVE-2009-3459 (Adobe Reader U3D CLODProgressiveMeshDeclaration heap overflow, APSB09-15): the U3D parser runs without any user interaction once the page is rendered, while the accompanying JavaScript prepares a heap-spray to land controlled memory inside the corrupted allocation.
  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • ClamAV: Pdf.Exploit.Agent-23992 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-23992
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Suspicious extracted artifact info 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.
  • 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://vcg.isti.cnr.it)/S/URI/Type/Action
    • http://meshlab.sourceforge.net)/S/URI/Type/Action
    • http://vcg.isti.cnr.it
    • http://meshlab.sourceforge.net
    • 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/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0015_000.js
9d875d317fb7b2622a16f91b93497b2fba406155abe62f56fa0cb7bdd0180132		 pdf-javascript-stream PDF /JS object 15 at offset 0x665 2579 bytes
stream_010_off00034e28.bin
b1f937b9541d599e1c6000c4c47f7f3f21a4d9b0e1051c8a5580e07bc6106afd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E28 177792 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.72, consistent with packed or encrypted content.
font_00_type1_off0002e265.bin
d129a586d7449f3004ab2629e1b01753002037f8ca955d68339aba6fea13d9dd		 pdf-font-stream PDF embedded font (type1) at offset 0x2E265 6428 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.55, consistent with packed or encrypted content.
font_01_type1_off0002fb00.bin
6d68a200ddadd677e7031f9795a017ce42b4d7f02b68d39a072ecbc1e20fb5d6		 pdf-font-stream PDF embedded font (type1) at offset 0x2FB00 7849 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.64, consistent with packed or encrypted content.
font_02_type1_off000319cc.bin
cab7a46a0f2b73639fc37aa221b515da6888b096748ee89dec2f4876e25f7f1f		 pdf-font-stream PDF embedded font (type1) at offset 0x319CC 2374 bytes
font_03_type1_off000321bd.bin
f1d06dc0327817e03d778a88f65436557134c269106fbc5438dd4ef0c897a441		 pdf-font-stream PDF embedded font (type1) at offset 0x321BD 11287 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.76, consistent with packed or encrypted content.

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