PDF malware analysis — malicious · db82709ac8170509

MALICIOUS

PDF

3.6 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 3e874704d7ffe9406d8216191be80466 SHA-1: 3370324e74309eb67b313eef4acc754cbfa0dc7f SHA-256: db82709ac81705097bff13295704295cf05ea1b10a722a97e9f01fdd89471a48

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is triggered by the OpenAction. Heuristics indicate the use of eval() and String.fromCharCode, along with a critical finding for CVE-2007-5659 (Collab.collectEmailInfo). This suggests the script is designed to deobfuscate and execute malicious code, likely downloading a secondary payload. The obfuscated nature of the script and the reliance on a known PDF vulnerability point to a downloader or exploit kit.

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. (identified after JavaScript deobfuscation)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `ab7e58fe0a555021999004489e9131c14ce53beab065f5b5ac07543acd3fe170`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	11486 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `99faff1a815a2c3329ff05b248d13586df2fcf9f37cd428b0627b3a90777b6d2`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x450	3390 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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