PDF malware analysis — malicious · 0a03ca29c5af6d2b

MALICIOUS

PDF

148.7 KB Created: 2010-06-29 10:30:35 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0) First seen: 2026-05-10

MD5: 88cea8ee0a8fdd85a6955413cd0beca2 SHA-1: 4c7a55bd718a43c7e3746ddbd9de8feb9079cee4 SHA-256: 0a03ca29c5af6d2b8e373e947a94305115a222dd12e186fcea68c25be720c2d7

578 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains multiple critical heuristic firings indicating exploits for Adobe Flash Player (CVE-2011-0611, CVE-2009-1862, CVE-2010-3654, CVE-2009-4324). The embedded JavaScript uses the `media.newPlayer()` function, a known trigger for these vulnerabilities, to execute a second-stage payload. The primary purpose appears to be arbitrary code execution via a Flash exploit embedded within the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9880

Heuristics 14

Adobe Flash Player RichMedia exploit critical CVE likely CVE_2011_0611_FLASH_RICHMEDIA

PDF combines RichMedia Flash activation with an embedded AS3 SWF loader (ByteArray/loadBytes) and shellcode heap-spray staging. This is the static exploit shape associated with CVE-2011-0611 Flash content delivered through Adobe Reader.
Adobe Flash/authplay SWF exploit in PDF — CVE-2009-1862 critical CVE likely CVE_2009_1862_FLASH_RICHMEDIA

PDF combines RichMedia Flash activation, an embedded SWF, and PDF-side shellcode heap-spray staging. This matches the 2009 authplay.dll Flash-in-PDF exploit delivery shape even when the SWF bytecode does not expose stable printable Run_Sploit markers.
Adobe Reader authplay SWF exploit in PDF — CVE-2010-3654 critical CVE likely CVE_2010_3654_FLASH_RICHMEDIA

PDF combines RichMedia Flash activation, an ActionScript 3 SWF containing DoABC/SymbolClass code with URLRequest or StagePlayer/ByteArray/loadBytes markers, and PDF-side shellcode heap-spray staging. This is the static delivery shape associated with CVE-2010-3654 Adobe Reader/Acrobat authplay Flash handling.
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)
Flash ActionScript-3 exploit loader in PDF critical CVE related PDF_FLASH_AS3_EXPLOIT_LOADER

An embedded Flash (SWF) object's ActionScript-3 bytecode contains exploit-loader primitives: decompressing an inner SWF into a ByteArray and executing it via LoaderContext.allowLoadBytesCodeExecution, and/or Vector heap/JIT spray groomers. Benign Flash content does not load and execute code from raw bytes — this is a staged Flash exploit delivered through the document.
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.
JavaScript action low 2 related findings 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)
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.
Matched line in script
```
 var nop =  unescape("\x25\x750c0c");
```
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)
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
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.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off00000392.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x392	4264 bytes
SHA-256: `8db3684d81012001d07c46100d2b79a1837e73a57de39701139d4820cd0e7720`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
`legacy_pdfkit_stage_000.js`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x392	126 bytes
SHA-256: `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`
Preview script First 1,000 lines of the extracted script media.newPlayer(null); /* AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA */
`objstm_0017_00.bin`	pdf-objstm-decoded	PDF /ObjStm 17 0 obj (inflated)	871 bytes
SHA-256: `dd7918c182d6e2b8d996a6b8ee81663c49a0cb297efe1e1fa3c5af0c987bde84`
`polyglot_child_pdf_off00020887.pdf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x20887	19019 bytes
SHA-256: `d764d851ffb6c01f5c4aabfb488afe3a96ec3ad89225492f0956444e0ec4aa86`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`polyglot_child_pdf_off00023ae5.pdf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x23AE5	6125 bytes
SHA-256: `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`

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PDF

Malware Insights

Machine Learning

Heuristics 14

Related samples 8

Extracted artifacts 5