PDF malware analysis — malicious · cbec4637b5e85c88

MALICIOUS

PDF

2.7 KB Created: 2010-71-02 07:06:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a0be16cb0ce7050cde63eebb8397edbd SHA-1: 4afef5eca0e0940a6e6b063776d4f9ef2d768aed SHA-256: cbec4637b5e85c8846ec56543d7f53a3c78d396728605fcd39fcbdcea8440a9a

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating it's designed to execute code upon opening. The critical CVE-2007-5659 heuristic firing confirms the exploitation of a known PDF vulnerability (Collab.collectEmailInfo). The presence of an embedded JavaScript file further supports the malicious intent. The script is likely responsible for downloading and executing a secondary payload, as suggested by the ClamAV detection as a dropper.

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-7304616-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7304616-0
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)
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` `fe83de9206195c846291fd43513a9c8bac2adb9e7b399e25d79007b2e2279f37`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	3653 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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