Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80a73bd7b36534e…

MALICIOUS

PDF

142.9 KB Created: 2010-06-29 10:14:47 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0)
MD5: a3f87c9468e0850cc5e5ab16c639cb31 SHA-1: c2de9ed5a19d32c84003359a377c05da8d868d80 SHA-256: f80a73bd7b36534e69d1b2bc0c4e3c1d6fc746fdd74f626b99cd5b0284ccb406
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

This PDF exploits CVE-2009-4324 using embedded JavaScript. The script is obfuscated but appears to be designed to download and execute a secondary payload. The presence of a polyglot child PDF and suspicious JavaScript streams further supports this conclusion. The specific exploit trigger, 'media.newPlayer', is indicative of this vulnerability.

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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0021_000.js
492c2be2fb1406be7c72f22a59ecb7fc7b31fe91e210300c04051deda9087c45		 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).
legacy_pdfkit_stage_000.js
42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74		 deobfuscated-js string-concatenation normalized Acrobat API aliases at offset 0x514 126 bytes
font_00_sfnt_off00015b44.bin
b918810d7b08c5f147ade1b915299d0e6f34c9132d3f1481d3aa23f9adb8f869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B44 56288 bytes
font_01_sfnt_off0001c1c0.bin
04522607bc033f075fa18a93072ffe88018a7c42408fdebc57263e47d1a5c27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1C0 23772 bytes
font_02_sfnt_off0001eeec.bin
de1a1825193230fc0703cd1f73406e47dd1bc637ec6f4ce2e909f1846fdef715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEEC 23268 bytes
polyglot_child_pdf_off00006502.pdf
5d3d9a367c6e8a58ed1181d4b83cb0e0836490356e5ef15c80e045ab44e03523		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x6502 120495 bytes
polyglot_child_pdf_off000223c4.pdf
0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x223C4 6125 bytes

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