PDF malware analysis — malicious · 9629946d66f77669

MALICIOUS

PDF

184.0 KB Created: 2009-03-05 21:22:26 +08:00 Authoring application: Acrobat Web Capture 8.0

MD5: 51ceee59bf88395e4625d59193d92b3f SHA-1: 5115b5a5e7e169ef0a3ad3c771ac77916b893cfa SHA-256: 9629946d66f77669ee0046a61accc0eaca6521b6ddded0e183345e4f56670c65

178 Risk Score

Malware Insights

The PDF file contains embedded JavaScript that leverages the CVE-2009-0658 exploit, targeting a heap-spray vulnerability in Adobe Reader's JBIG2Decode filter. This indicates the file's primary purpose is to deliver and execute a malicious payload via a known exploit. No specific malware family was identified, but the exploit mechanism is clear.

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 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0054_000.js` `76b9a9d595e071c01fab427db3229805067700ca8167c99a8d39a6f6869c3734`	pdf-javascript-stream	PDF /JS object 54 at offset 0x9495	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_009_off00001c1f.bin` `6a71966cad617bfb05c2fc57e09517130f7abf80fb7d2cd8d6f9a72dd0ff8cc6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C1F	8958 bytes
`stream_012_off0000a650.bin` `a286a724917c4ed12e23c56fdbe9b05a086df706402e840df93ca822a639bf8f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xA650	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_013_off0000b7b5.bin` `6300b36f22ef6578b0f03e4e9331a4dc1cfa3ef51cfced50c1ce2d725dd82351`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB7B5	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_014_off0000c848.bin` `9fdeb4cf92d3ba004fe834e1ec15e7554d02b14121596b2b2948628aa9003bc4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC848	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_015_off0000d8db.bin` `0a9d23151e9073a8ce6d92ab297ef25ffa9a4997c3ef7ce0ab8072f24b3d913b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD8DB	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_016_off0000e96d.bin` `eda1a66b85446d51354818baf9e701cdc2d3426a71f8bb35fcb677bb522646b5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE96D	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_017_off0000fa00.js` `81adc8bd7014daa6355cf20ea01b14f79bca4b4c76f8c2fd674fb8103622f478`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xFA00	1845 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_018_off00010ad8.js` `458e954f8b259080881683abc6ca3cff365a406c2deb959633a401931e84049c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10AD8	1824 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`jbig2_00_off00008305.bin` `c45438827f6e20042f8514b09a4460667cf8cfa7b86627424b51bc1379adcf89`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x8305	3739 bytes

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