PDF malware analysis — malicious · 2d3cd9ccc3e5b843

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: feaf9ceff8a6d88b96e2b0e40ffe18d2 SHA-1: 03137056c50cfa6a678bc6a37641d58de2bc4f1f SHA-256: 2d3cd9ccc3e5b843de69781c77be210023b18a92c54e5025c94a9bd8c8c1ac27

166 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. The JavaScript utilizes eval() and String.fromCharCode, and specifically targets the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This indicates the script is designed to download and execute a secondary payload. The heuristics suggest obfuscated JavaScript, and the file type is PDF, commonly used for exploit delivery.

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)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `2314f1b825b314a8201d39e479a11655ea395c4b7e2291b7b9081eb5ec33e0dc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14113 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `ed2d0ab9efd8792ecce99f05bf30650d5546c346e1f2a99ecff9d78c8d72a9c3`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4224 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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