Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4208d03a69a3673…

MALICIOUS

PDF

45.6 KB
MD5: b0a364650c1d1f8c4ffdc265367b175d SHA-1: 3890854cdc43e1162215f7106ff41684f9b08573 SHA-256: a4208d03a69a3673e7c49058d735a36d4c01d8285ba4541d8c5523ee9b89a982
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier also flagged this PDF as malicious with a high probability. While the document body is heavily obfuscated and unreadable, the presence of JavaScript suggests an attempt to execute malicious code. The embedded URLs are related to XFA forms, which can be exploited. No specific malware family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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
e92f9ea1991d70583626b63539feaaa276d822b2a6454e58b19735ef07ed4658
pdf-javascript-stream PDF /JS object 12 at offset 0xA208 4088 bytes