PDF malware analysis — malicious · d5416c1d0a3cb912

MALICIOUS

PDF

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

MD5: 7efae7c86ed49b6af5c8910d7b0ffb40 SHA-1: c4738479ab4bd3f3d493fa99e6166fb00516ffe8 SHA-256: d5416c1d0a3cb912a247ef7fd0f9198ebec8cff76c77a3c45a18753ceacdfe1d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF document contains embedded JavaScript that is triggered by the 'OpenAction' property, a common technique for exploiting PDF readers. The 'eval()' function and 'String.fromCharCode()' are used within the JavaScript, indicating obfuscation and dynamic code execution. The critical 'CVE_2007_5659' heuristic firing confirms the use of the 'collab.collectEmailInfo' method, which is known to be vulnerable and is used to construct and execute JavaScript. This suggests the primary intent is to download and execute a secondary payload.

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` `7515dd7110f4b2262d344faf95b019b442fe1c55fcf3c01094a8d7973c328c7e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13505 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` `29d230e75aea9268d5d7b9d7205fc19f0a24a2d88f4dadb57904c4a761e4b3df`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4032 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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