Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3264c69eafbfa7f…

MALICIOUS

PDF

326.9 KB Created: 2010-04-22 01:58:49 Authoring application: Microsoft® Office Word 2007
MD5: bbfcb829dc22d04910794e4a5ba4288d SHA-1: d9d24fe74a052e627560664deb098719207facbe SHA-256: f3264c69eafbfa7fe4e4713b8e9750572d7f443a5df9f0a4d82c8872fe6303fd
236 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that is obfuscated and utilizes unescape() calls, indicating malicious intent. The presence of heuristics related to CVE-2009-4324 and CVE-2023-26369 strongly suggests exploitation of these vulnerabilities. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload. The polyglot nature of the PDF, containing a secondary suspicious PDF, further supports a multi-stage attack.

Heuristics 8

  • 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)
  • TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED
    PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000063a.js
b4e915d7fafe7c5616c8a988b08e3c320938d3b6f00c71c27d8b719b98081e3d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x63A 2610 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
stream_019_off000188c4.bin
31bd67720d85816c885c61fad12756890a3bbcdb33f74d3c8b74a9b4d89684c4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x188C4 450420 bytes
legacy_pdfkit_stage_000.js
42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74		 deobfuscated-js string-concatenation normalized Acrobat API aliases at offset 0x63A 126 bytes
objstm_0023_00.bin
e8bfe65c34a535b0837ce7c541e45b42ab61e1ff13de05788daf7770f9a1ec0e		 pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 274 bytes
polyglot_child_pdf_off0000ede3.pdf
dbb9d8c6ecbb5dc94f6a8339c96bbdf1837904ca5c619e3ed13421b99b98e219		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xEDE3 273816 bytes
polyglot_child_pdf_off0005038e.pdf
0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x5038E 6125 bytes

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