PDF malware analysis — malicious · f43c32958c251c7b

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: 6fdf56f58ef248619263c72d67980de4 SHA-1: e2c97397afa58897962ca6b8ea44ff6e68cc9316 SHA-256: f43c32958c251c7be97d645244678fe3f1db0a46e158352ef75ff3580642e2c5

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript triggered by an OpenAction, which is a common technique for exploiting PDF vulnerabilities. The critical heuristic firing for CVE-2007-5659 indicates the use of a specific exploit targeting the `Collab.collectEmailInfo` method. The embedded JavaScript, particularly the `eval()` call and `String.fromCharCode` usage, suggests obfuscation and dynamic code execution, likely to download and execute a secondary payload. No specific family could be identified, but the exploit and execution method are indicative of a malicious PDF dropper.

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` `c6a6ffc8135a5d4f0cf853f5a3f61b91e8f0aa486d018df2d75c431fc4c11582`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13327 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` `d3c5324d8ba6db23b72af4bd7d5baf7c5f8f0145ee2396caa382dd3f85953db2`	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).

Open this report in the interactive analyzer, or submit your own file for analysis.