PDF malware analysis — malicious · cc825c10fb8720e7

MALICIOUS

PDF

3.5 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: fd63f3abda58e905d1e806a04783313b SHA-1: 0737009a5c86596a52749df1a3dfbb2283bef07f SHA-256: cc825c10fb8720e725b62a5869adf8d9184fc833df5ba40f8a1eaeac51ad642b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that utilizes the 'Collab.collectEmailInfo' method, which is known to be vulnerable in older versions of Adobe Reader (CVE-2007-5659). The JavaScript is obfuscated and appears to be designed to decode and execute a second-stage payload. The heuristics indicate a critical vulnerability exploit and the presence of eval() calls, suggesting arbitrary code execution.

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. (identified after JavaScript deobfuscation)
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_000.js` `cbcd58e7778dee7c23f0f1bbed0b8bffe1a2845c09f2d2bcced1b6fdf4b93978`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	3358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `d5a995ad1efe7e17ae4c3fdbfd4b192f579ea803e4905472ed3b8ce5455e9266`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x40B	2151 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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