PDF malware analysis — malicious · 343b3e0a3056cc8c

MALICIOUS

PDF

5.0 KB Created: 3486-67-13 64:18:28 -26:14 Authoring application: Acrobat Editor 8.0 (via Adobe Acrobat 8.1.0)

MD5: ba460f13323c2fe4be414a30b076d36a SHA-1: 086a656f58b53828f591c6c34e81d3594aa530fa SHA-256: 343b3e0a3056cc8ce8f67de8eea517ce70254a84eb5bb544015f82d43a0ccb46

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated and appears designed to download and execute a secondary payload. The ML classifier strongly indicates maliciousness, and the critical heuristic firings confirm the exploit attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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. (matched in decompressed stream)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0028_000.js` `3b9bdca5786c0495a1f65f084cd35e0952f0c8ea5296b147f303205136ed1616`	pdf-javascript-stream	PDF /JS object 28 at offset 0x504	2232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `dbfd9b39b38a4416ded6728aa2269acb9b9580317bb112d2bb4d9edc29cf7027`	pdf-javascript-stream	PDF /JS object 28 at offset 0x539	2170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`combined_document_js_000.js` `507dbbbd332cf5615e6155d532f39d5c8779adbd0903ec1dbedd4d2332c0338c`	deobfuscated-js	combined document JavaScript streams at offset 0x504	4403 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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