PDF malware analysis — malicious · a69f95d9e59acb25

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: c4b9dc78a36d4d3054b46b746b192d7a SHA-1: 8b5ec8358f05512abab960aae128d8d849f45cf2 SHA-256: a69f95d9e59acb2515b778b0868da3e196f06dccb0cab1012dc26e1c52affaa5

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting PDF viewers. The critical CVE-2007-5659 heuristic indicates the use of a specific exploit targeting the Collab.collectEmailInfo function. The embedded JavaScript, particularly the use of eval() and String.fromCharCode, suggests obfuscation and dynamic code execution, likely to download and execute a secondary payload. No specific family could be identified due to the generic nature of the exploit.

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` `7da5bf862f1c2a2fbec4a2152a66c03c743ba92e1cefd23ac337435035e47b71`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14049 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` `c350f0bdee03ee1511dca1ac8054ce3c83fde7ae748ccd65105077f9405efab9`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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