PDF malware analysis — malicious · 8f07a723f58a0580

MALICIOUS

PDF

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

MD5: 34527a2887cd3f97211c8d0e89bda8b9 SHA-1: ba01448f245066e05e68d3074a0b9121023289d3 SHA-256: 8f07a723f58a0580a5fa5401ce650c2460788f5ba0c5ba5077fa7621352ff849

182 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes a heap-spray technique, specifically targeting the CVE-2009-0658 vulnerability in Adobe Reader. This exploit is designed to decompress and execute malicious code, likely a downloader for further stages. The presence of multiple decompressed streams and JavaScript actions points to a complex exploit chain.

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.
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 0x7B82	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_009_off000019a3.bin` `6a71966cad617bfb05c2fc57e09517130f7abf80fb7d2cd8d6f9a72dd0ff8cc6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x19A3	8958 bytes
`stream_012_off00008d3d.bin` `a286a724917c4ed12e23c56fdbe9b05a086df706402e840df93ca822a639bf8f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8D3D	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_013_off00009ea2.bin` `6300b36f22ef6578b0f03e4e9331a4dc1cfa3ef51cfced50c1ce2d725dd82351`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9EA2	867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_014_off0000af35.bin` `9fdeb4cf92d3ba004fe834e1ec15e7554d02b14121596b2b2948628aa9003bc4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xAF35	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_015_off0000bfc8.bin` `0a9d23151e9073a8ce6d92ab297ef25ffa9a4997c3ef7ce0ab8072f24b3d913b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xBFC8	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_016_off0000d05a.bin` `eda1a66b85446d51354818baf9e701cdc2d3426a71f8bb35fcb677bb522646b5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD05A	868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_017_off0000e0ed.js` `81adc8bd7014daa6355cf20ea01b14f79bca4b4c76f8c2fd674fb8103622f478`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE0ED	1845 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_018_off0000f1c5.js` `458e954f8b259080881683abc6ca3cff365a406c2deb959633a401931e84049c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF1C5	1824 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`jbig2_00_off0000751f.bin` `22ef31edb8633252249fefc7e47e718d65772f340ed6a92cdbb534c1c9cc1689`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x751F	878 bytes

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