PDF malware analysis — malicious · ef9c752a1c81794f

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: f016da9f47d0b3912cde3e3adedfcace SHA-1: 2bbeba5397dde72439d86337395e3073ac69f2ce SHA-256: ef9c752a1c81794f04b685b7bdb682b60bb4a2e6bbe45f6ca785014014c7259c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF document is malicious, leveraging the CVE-2007-5659 vulnerability through an OpenAction trigger and embedded JavaScript. The JavaScript uses eval() and String.fromCharCode, indicating obfuscation to hide its true purpose. The primary intent appears to be the execution of a second-stage payload, as suggested by the heuristic firings and the 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` `3f8eb8bbce52452c50a6c163241772ae23e5f4db328c44e37c3af50372d4a071`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13821 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` `5c295579ce2a78113ce429ba424c1423d6a4cb2b9b667d0f989816e342d70680`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4200 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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