Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c782a56dabfdcb2…

MALICIOUS

PDF

45.2 KB
MD5: b2f91f49b5ea1fc8380841f28a7cd190 SHA-1: 7d36ac1ad5b721d7eeaed920ba69fefbaf8d59f7 SHA-256: 7c782a56dabfdcb2f3aa4dbb9e0cd2a2ae1212f7007ea09307636cd58f0e1c7d
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier and ClamAV detection strongly suggest malicious intent. While the document body is unreadable, the presence of JavaScript points towards an attack pattern involving script execution. The embedded URLs are not directly indicative of malicious activity but are included as potential indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
59d2e71d4f269c8e362da818bde05604c1b2a70c34db3544a3f4e692faa9eb47		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1DA 3683 bytes

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