PDF malware analysis — malicious · 6230f4f71f5433ee

MALICIOUS

PDF

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

MD5: 82eeda4a754bf163d406e3e205df97e9 SHA-1: 97a2691ffdac097062a7e6e387879bdd8a5ffe08 SHA-256: 6230f4f71f5433ee848861c4cf7338a9b39121a9e9d15f9fb92ef2a4d4039a85

350 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains JavaScript that exploits CVE-2009-4324 via the media.newPlayer API. The deobfuscated script `media.newPlayer(null);` directly indicates the exploit trigger. This exploit is designed to execute arbitrary code, which is then likely used to download and run a secondary payload, as suggested by the 'PDF JavaScript exploit cluster' and 'ML_NYX_PDF_MALICIOUS' heuristics.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 10

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)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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-30102 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30102
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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.monotype.comhttp://www.monotype.com/html/type/license.html
- 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/
- http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlNOTIFICATION

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0021_000.js` `f84c2af5b00a74f424b31af20ad0379dd8087afef19304bf58559f2d4045d26e`	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_off0001699d.bin` `9a4141995a4807697fe00050b23fdea972d9ffd87a0ea419b54a9bb21ea10bd2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1699D	107360 bytes
`font_01_sfnt_off000258e1.bin` `f076845cc1ca325a3b9cf03cf9aa01e714a05c0313fa04e01f7517cdb9cb0ea1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x258E1	40248 bytes
`font_02_sfnt_off00029677.bin` `6ecc3b71b33881421db4abe890eedea0619c986ebbe63729ec577ed525274575`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x29677	49640 bytes
`polyglot_child_pdf_off00006702.pdf` `d46e62cd40419166033ea1c3d3f36039db4162c2648db5d408d6acfc74be7214`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x6702	183058 bytes
`polyglot_child_pdf_off00031a27.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x31A27	6125 bytes

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