PDF malware analysis — malicious · b3dfe9d81fad9c42

MALICIOUS

PDF

2.8 KB Created: 2009-10-07 14:03:17 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 6169f2aa002d35bbeffd8a9ae5dcb8ab SHA-1: a4ed3f968572f3033dd227e84ea6ac731caa739f SHA-256: b3dfe9d81fad9c42b5182ece6e753e2b0d38851eb940fa1439083ba3562c49ef

256 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript triggered by an OpenAction, a common technique for exploiting PDF readers. The critical CVE-2007-5659 heuristic indicates the use of the Collab.collectEmailInfo method, which is known to be vulnerable. An embedded JavaScript file was extracted, suggesting it is used to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature.

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: Pdf.Dropper.Agent-7294870-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7294870-0
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` `938cafecc80b7172ac1e425c83e5eda1ce848fc1b830a39c903438bf5708c514`	pdf-javascript-stream	PDF /JS object 13 at offset 0x366	2848 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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