PDF / ._PD malware analysis — malicious · 43027e8cd63728e4

MALICIOUS

PDF / ._PD

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

MD5: fc378f4a858b04c87b59c3a3b5080739 SHA-1: d1a78e24e97b636be913cbcf2deab34d673890c8 SHA-256: 43027e8cd63728e486515d92ac4496e5d5856047edc9c5e99c156a66c6054eb9

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains a critical exploit for CVE-2009-0658, targeting Adobe Reader's JBIG2Decode functionality. The exploit utilizes a JavaScript heap-spray technique to achieve code execution. The presence of embedded JavaScript streams and the ML classifier's high confidence score further support the malicious nature of this file. The primary attack vector is the exploitation of a known vulnerability to deliver a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 9

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.
ClamAV: Pdf.Exploit.Agent-24263 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-24263
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` `0a91b97242d8a21889d937129da51e217931b670df3e77c0e199a957ebd2788f`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x8305	3739 bytes

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