PDF malware analysis — malicious · a347ea464d10acb9

MALICIOUS

PDF

2.8 KB Created: 2011-26-12 48:54:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 75c8fc041b276619e1ae6f92a28dadbf SHA-1: 192074effb27f89606b39ee4b7c5fe71ceabad37 SHA-256: a347ea464d10acb92179e279898c017be4795c06a19866d35904f8fcf65b7dfd

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1559.001 Component Object Model: Component Object Model T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting PDF readers. The critical CVE-2007-5659 heuristic firing indicates the use of a known vulnerability (Collab.collectEmailInfo) to execute code. The embedded JavaScript file, javascript_obj0013_001.js, likely contains obfuscated code intended to download and execute a secondary payload, although its exact function cannot be determined without further analysis.

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)
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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `f1d07ad4094f55d8b276d8dfe42f6e00bbf31242db3be758149e5c29db5bcc87`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	3668 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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