PDF malware analysis — malicious · 9f9edf1665405c71

MALICIOUS

PDF

2.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 30dc16a718e256d9fba686be2a662cd7 SHA-1: dbb2821ffa4e7affbfee0e70e91a6efeb0eaa660 SHA-256: 9f9edf1665405c71a6bda9c6a99730887739354d8e7eabc06386f552dde831ff

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the 'OpenAction' upon opening. The heuristics indicate the use of JavaScript actions, embedded JS streams, and specifically the 'unescape()' function and 'Collab.collectEmailInfo' method, which are associated with CVE-2007-5659. The ClamAV detection as 'Win.Trojan.Agent-34667' further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the heuristic 'Suspicious extracted artifact — Signals: Script obfuscation indicators'.

Heuristics 7

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)
ClamAV: Win.Trojan.Agent-34667 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-34667
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `b083c642d76189a1ab2cab2f3647285fb98571e264d16f39e551121269a61ff8`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36C	2673 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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