PDF malware analysis — malicious · e82c54a18775a3f5

MALICIOUS

PDF

76.7 KB Created: 2006-06-18 12:11:19 Authoring application: Image to PDF Converter, Build: Jul 14 2008 (via Image to PDF Converter (http://www.imagepdf.com))

MD5: e74ecf86b06829942cafa5b661af04f8 SHA-1: c090b7152c5d80a67cce9d7cb45c6ed2ba7926b4 SHA-256: e82c54a18775a3f5899d871ece2c881602d473b1adb2b95bd21ac6cd4dfff72a

274 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains embedded JavaScript and triggers a critical CVE-2009-0658 exploit related to JBIG2 decoding. The embedded JavaScript, although obfuscated, is likely responsible for downloading and executing a second-stage payload. The presence of multiple JBIG2 streams and the ML classifier's high confidence further support its malicious nature. The document body contains repeated URLs, potentially for lure or command and control.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 11

Adobe Reader JBIG2Decode generic heap-spray exploit critical CVE likely CVE_2009_0658_GENERIC_SPRAY

PDF combines JBIG2Decode image streams with JavaScript heap-spray or decoder scaffolding. This is likely CVE-2009-0658-family Adobe Reader JBIG2 exploitation, but it lacks the stricter Reader-9 version gate or decoded page-word shellcode fingerprint required by the exact rule.
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.Dropper.Agent-6308025-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-6308025-0
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.
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.
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.imagepdf.com/
- http://www.imagepdf.com\))/Creator(Image
- http://www.dynaforms.com
- http://www.imagepdf.com
- http://www.imagepdf.com\
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0052_000.js` `107329aa908106adfe3aac2e4d3189d5a61aaa3b4abeee89df7d6cfa5f7e9df4`	pdf-javascript-stream	PDF /JS object 52 at offset 0x12FB2	861 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`jbig2_00_off00000afa.bin` `e899de1902b0f9ea5451d9d1b38822ec4d6e74ce91118e99284807d4ba7e46fc`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0xAFA	6885 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.
`jbig2_01_off00002a06.bin` `13135e18100476acf64d12883ae147d8ce65873b370a6defb93431dadcc105a5`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x2A06	13608 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`jbig2_02_off0000635e.bin` `dedfefe24558656a9350fd65eb2e76d46445da7fc98e71e8b9da1dea89224515`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x635E	12266 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`jbig2_03_off0000977b.bin` `7df82efccc2213d446a2ca88f1000d8de6a1f92d7388b1fa1d9bcdb7b233ceaf`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x977B	13472 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`jbig2_04_off0000d04f.bin` `8b9eee256bf34e2892fae9fec405f9339cc7e088f3630c5e25f0af2e5aa9cf57`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0xD04F	13894 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`jbig2_05_off00010ac8.bin` `141b31cb3bc5af7860119f0f1f911b088b18bc07d392e4d5b94040ebbe9bc961`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x10AC8	6796 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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