Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dea76579a7d8349…

MALICIOUS

PDF

140.1 KB Created: 2010-06-29 10:14:47 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0)
MD5: b54d6c2857b56f625e411a6c63810fac SHA-1: e88427c5288102e6227f59b399fd9de024da0c1d SHA-256: 7dea76579a7d834936321153aba65eee3696329e8aece296e938aefcc0a82b95
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that exploits CVE-2009-4324, as indicated by the 'media.newPlayer' heuristic. This exploit is used to download and execute a secondary payload. The presence of a polyglot child PDF and suspicious JavaScript further supports this attack pattern. No specific malware family was identified.

Heuristics 7

  • 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. (identified after JavaScript deobfuscation)
  • 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.
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • Suspicious extracted artifact medium 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.
  • 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/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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0021_000.js
0ac7d5259b2c6d39945719a442611bbcd1c24769dcbc4cadd60975682bb9189b		 pdf-javascript-stream PDF /JS object 21 at offset 0x514 2371 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
stream_015_off00010856.bin
a0586a7bbd5619cf5a4df52a830fe10203361536a35b016506ff620d74065855		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10856 94148 bytes
legacy_pdfkit_stage_000.js
42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74		 deobfuscated-js string-concatenation normalized Acrobat API aliases at offset 0x514 126 bytes
font_00_sfnt_off0000da8b.bin
fd28862384e8e00be9a9bf30d7ec7e843108ace8d0b1c8c7a6aca6b618c4c337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 8104 bytes
font_01_sfnt_off0000ee0c.bin
71eebb29cd6ef2901fc712d2f77d65cb5b28019ee31c634292d3874c6fca554a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 6404 bytes
font_02_sfnt_off0000fe56.bin
300e102a87ce1b0d9e054700275d376ea8d86270bcf4e9eb05365955c46796ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 3272 bytes
font_04_sfnt_off000200d9.bin
b62a8c1b9c497dfed1d1f3c78b7c5f20dd7ab9ea290c0f1f47e2a9a00f00a8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x200D9 5684 bytes
polyglot_child_pdf_off0000650e.pdf
90763ea4ba55a7e93e256c7a077045404ae99e37400e3cfe08b9f43a30dc5693		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x650E 117607 bytes
polyglot_child_pdf_off00021888.pdf
0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x21888 6125 bytes

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