PDF malware analysis — malicious · dc5d2f8c3ebdc99b

MALICIOUS

PDF

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

MD5: a3c3d60906a63c86cbf83f530aed26e9 SHA-1: 4742720c90057755ee50dc7b139355f230c8c061 SHA-256: dc5d2f8c3ebdc99b33c9ed96ea6f835d94dd1ac8c1a1ebd1bd965ea2de55b604

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.001 Component Object Model T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript that is triggered by the OpenAction. The script utilizes the `unescape()` function and the `Collab.collectEmailInfo` method, which is associated with CVE-2007-5659, indicating an attempt to exploit a vulnerability in Adobe Reader. The script's obfuscated nature and the use of a known exploit suggest it aims to download and execute a secondary payload.

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.
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
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_obj0012_001.js` `8b49c8fd788984e41a13e3b51afe0d2a104d32c69960ddecb3a996c11f318bd0`	pdf-javascript-stream	PDF /JS object 12 at offset 0x372	1996 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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