PDF malware analysis — malicious · 18b14ef18445d2f7

MALICIOUS

PDF

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

MD5: 46014ca46f1643711ff34cabe690b19a SHA-1: b90104379a2e09461a2a8dfea0fc03cae7ce93c6 SHA-256: 18b14ef18445d2f70095ba9403bffddfbc51fc220844cc152fbc567dbd6432d0

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that attempts to download and execute a second-stage payload from the URL http://ins.loc/1_nuke/.k.php. The ML classifier strongly indicates maliciousness, and the embedded script's action is a common technique for delivering further malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
Suspicious extracted artifact medium 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.
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.
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://ins.loc/1_nuke/.k.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `b43278a28c448cf237b0ae95e046d0fc5f68eae19e9b1ca3a604dc36df947d0d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	307 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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