PDF malware analysis — malicious · aaf8d265fdff5f2c

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: 252558580f95e03501894e761d2580dd SHA-1: 834653346df8d0948be141b67abaa1cfd371bda5 SHA-256: aaf8d265fdff5f2ce0f28f8863b47d8c5c95aab7b90005c39b5e99e90f0e16a7

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

This PDF file contains embedded JavaScript triggered by an OpenAction, a common technique for exploiting PDF viewers. The critical CVE-2007-5659 heuristic indicates the use of a specific vulnerability involving `Collab.collectEmailInfo` and JavaScript evaluation. The embedded JavaScript, particularly the deobfuscated `numeric_charcode_stage_000.js`, likely serves to download and execute a secondary payload, although the exact URL or payload is not directly extractable from the provided evidence. The use of `eval()` and `String.fromCharCode` suggests obfuscation to evade detection.

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` `dcf5c1d11485482056ac0032f54f75ad47eb5ebef02418bf302486ad11a39b81`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13543 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` `22a1eb4d5eef2224fdaf37e5e899a54e01d60e965bb314d7409257330f1d3d19`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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