PDF malware analysis — malicious · 501013bc933daafe

MALICIOUS

PDF

101.6 KB Created: 2010-06-29 10:14:47 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0)

MD5: 940ae58370cd3ed31f9fd7ca8672fa27 SHA-1: 27eccd9c924474e28ecef490a772adc5176d726a SHA-256: 501013bc933daafe495013a6392692217ba9426f125fb82f1a3995ab3b615642

256 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability. This JavaScript is obfuscated and likely responsible for downloading and executing a secondary payload. The presence of multiple embedded PDF objects and JavaScript streams indicates a multi-stage attack. ClamAV detection further confirms its malicious nature.

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)
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: Pdf.Exploit.Agent-30090 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30090
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0021_000.js` `cf92dee4565f61fe8c8a865b90fc09cd2d7902a87904173035492e7c4ae1fa51`	pdf-javascript-stream	PDF /JS object 21 at offset 0x514	2773 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).
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x514	126 bytes
`font_00_sfnt_off00014d1b.bin` `305df70d5d8f1c2ad294259ee550c78044b9708aa653a954a23691498ca8d533`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D1B	4276 bytes
`font_01_sfnt_off000159ad.bin` `9310f595321ed304b80d5d2eab09a2248d36a6ddfb8225dca10c0863a3ecec98`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x159AD	18012 bytes
`polyglot_child_pdf_off000066fe.pdf` `b621f83313de96901ceb44859ba426cf90809996f45f46935d91039dd00e7a76`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x66FE	77693 bytes
`polyglot_child_pdf_off00017e8e.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x17E8E	6125 bytes

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