PDF malware analysis — malicious · 3c2321f7c199c0d1

MALICIOUS

PDF

60.7 KB Created: 2009-03-13 16:50:38 +08:00 Authoring application: Acrobat Web Capture 8.0

MD5: 65c0b1f2717a3385209cdfdea8c0e007 SHA-1: 204cf17929d26bf8daa3ef15176722b75034fa4c SHA-256: 3c2321f7c199c0d1a3e08f6bbff02e2d0b3d62945dc58bc2a5bae4f92a2b9bab

178 Risk Score

Malware Insights

This PDF file contains embedded JavaScript that leverages the CVE-2009-0658 exploit targeting a heap-spray vulnerability in Adobe Reader's JBIG2Decode filter. The script is designed to decompress and execute malicious code, likely leading to further compromise. The presence of the exploit and the JavaScript action strongly indicate this attack vector.

Heuristics 8

Adobe Reader JBIG2Decode heap-spray exploit critical CVE likely CVE_2009_0658

PDF combines JBIG2Decode image streams with a Reader 9 JavaScript heap-spray stage. This is the in-the-wild Adobe Reader/Acrobat JBIG2Decode exploit shape associated with CVE-2009-0658.
JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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.
Suspicious extracted artifact info 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 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `266e00ca3d7ec0109b0318dd8d869c90daf6a2ec1208ffd2c74bb2ce91900b1d`	pdf-javascript-stream	PDF /JS object 27 at offset 0x6BCC	1808 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_001_off00002374.bin` `6a71966cad617bfb05c2fc57e09517130f7abf80fb7d2cd8d6f9a72dd0ff8cc6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2374	8958 bytes
`jbig2_00_off000055da.bin` `ae1845b1fbba1550a6b86762a4d9f852e9a434d4c390ad69886d9054b418d5ab`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x55DA	4945 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.73, consistent with packed or encrypted content.

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