Malicious PDF — malware analysis report

Static analysis result for SHA-256 9921bbeba3dc8339…

MALICIOUS

PDF

279.4 KB Created: 2009-12-24 14:53:20 +08:00 Authoring application: Acrobat PDFMaker 8.1 for Word (via Acrobat Distiller 8.1.0 (Windows))
MD5: 333ac9661e97705e02c1a33b477af53e SHA-1: 830f394d959aa686ca2cce98136d8b7ac45b3f2a SHA-256: 9921bbeba3dc83390fed9ee5c7bdc1ca70d8bba3c62f4d83d633bc86c6882ae8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link T1071.001 Web Protocols

This PDF file contains embedded JavaScript and exploits the CVE-2009-4324 vulnerability via the media.newPlayer object. The embedded JavaScript stream is a strong indicator of malicious intent, likely to download and execute a second-stage payload. The presence of a secondary embedded PDF with suspicious static findings further supports this assessment.

Heuristics 6

  • 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)
  • 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.
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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 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/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
2b050a9b6baa519852016d21cd3826d46d60bb4ed298caa141faf81b1fc2aaa5		 pdf-javascript-stream PDF /JS object 6 at offset 0x1A9 4304 bytes
icc_00_off00012c4e.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x12C4E 3144 bytes
font_00_sfnt_off000137a9.bin
72cd06225944c5dfea62a2963a8639f879c2afdfad865f973da9246c7a877542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 237536 bytes
font_01_sfnt_off0001a921.bin
8ab8419a425c93aae4464ed152010c3d1d6543e582fe16d911007c6148c06761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A921 181284 bytes
font_02_sfnt_off00029f46.bin
0fdb044b351cd7a415b98b5174d0bebb73f4462cb6e7eed1c0ef90e2aa458355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29F46 30792 bytes
font_03_sfnt_off0002d619.bin
1b6686d2a04b0e31eeea760318c93efb175997462eea977866a33b4681acedbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D619 460012 bytes
polyglot_child_pdf_off000121d0.pdf
59401fc518f08dff0f66fe3fe47f3e2728c5a656ddcbdabde7e63735147d7f64		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x121D0 211960 bytes

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