PDF malware analysis — malicious · 20cde2281d4e1246

MALICIOUS

PDF

18.3 KB Created: 2008-08-02 11:25:13 +04:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0 (Windows))

MD5: 392b494760aadfd33f438d0e57966e97 SHA-1: 89518bd2e101eb0be6e27c93dca2810af85c4e08 SHA-256: 20cde2281d4e1246d6de6eaa23829a99e326bea6b7a95ac822441f781688ee0d

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659 (Collab.collectEmailInfo). This indicates the document is designed to exploit this vulnerability to execute arbitrary code. The embedded JavaScript streams, though obfuscated, likely facilitate the download and execution of a secondary payload, contributing to the malicious verdict.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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/iX/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `da02fa7d282eb6ded3aad2e9929bf958c008a476f0105e30819605171b114820`	pdf-javascript-stream	PDF /JS object 12 at offset 0x384	5096 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_003_off00002295.js` `266e5320d116739d90963a1c300c298f2a1385e2095235a57a0fe81b2c96a0ea`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2295	5098 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_004_off00003701.js` `420c4ad05fc16cbffac6d62639f53837442124fed8d56c3b67967c044c59b45b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3701	5119 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).

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