Malicious PDF — malware analysis report

Static analysis result for SHA-256 51351704c408b957…

MALICIOUS

PDF

45.4 KB
MD5: a773c259b24f872cd84ab84c5ae5f0f9 SHA-1: a62f5b24c17f7a703a739236ee4f08736a1bf55e SHA-256: 51351704c408b957c21394c49bae202bce596b8c167bb104202a37e5db47f1b6
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection further confirm its malicious nature. The embedded JavaScript is likely responsible for executing malicious code, potentially downloading further payloads or exploiting vulnerabilities. The presence of XFA form elements (PDF_XFA) is also noted, which can sometimes be leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8596

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
a02379f5fec10f96123539dcce089bdf2b7fb30fbdc29471fe8f6c76475421ae
pdf-javascript-stream PDF /JS object 12 at offset 0xA1C4 3859 bytes