PDF malware analysis — malicious · 80eba3884adbd672

MALICIOUS

PDF

155.1 KB Created: 2010-06-29 10:30:35 +08:00 Authoring application: Solid Converter PDF First seen: 2026-05-11

MD5: ba132c3b011171f111f356100590406b SHA-1: d47d7fb5fb3218b3e7b967da27755d6d98ab4d72 SHA-256: 80eba3884adbd6728adb131ceb1d86feef0148364a908d61ff531d8918de9e5a

580 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, specifically targeting CVE-2011-0611, CVE-2009-1862, CVE-2010-3654, and CVE-2009-4324. The embedded JavaScript uses the `unescape` function and calls `media.newPlayer`, which are common indicators of exploit loaders. The sample also contains an embedded Flash SWF file and a secondary PDF, suggesting a multi-stage attack. The primary IOC is the external URI, although it is marked as benign.

Machine Learning

Nyx PDF Classifier malicious score 0.8448

Heuristics 15

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)
External URI info PDF_URI

PDF contains an external URL action
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.seoul.intercontinental.com/intro.htm PDF link annotation
- 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	4210 bytes
SHA-256: `95bbb6e5eca65d7784654a6a02aab5672a491d62338daa717c640eec3e81e6a3`
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_off00018a87.pdf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x18A87	57809 bytes
SHA-256: `ee0eadb985442195766be1196e63d165db6a4f9825820986f6950a9854e5a8cd`
`polyglot_child_pdf_off0002546d.pdf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x2546D	6123 bytes
SHA-256: `dbaf49086d878ea41035d43ea1fb94ba3cbc0f16966ce9e3336e8f54a18203a8`

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PDF

Malware Insights

Machine Learning

Heuristics 15

Related samples 8

Extracted artifacts 5