Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad27ee6c94e2c84…

MALICIOUS

PDF

45.4 KB
MD5: e4c50ab5d7f98e9d8bc2e0539ab45c20 SHA-1: 274978ab526dfe99f3ade27fb24d8a03c1546b14 SHA-256: cad27ee6c94e2c8470085e283c8d068c81cae6a0a39e14172f245ac3e6ce8a8d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including ClamAV's detection of obfuscated objects and a high-confidence ML classifier, indicating malicious intent. Embedded JavaScript, though obfuscated, suggests the file's purpose is to execute code. The presence of XFA form elements further supports the likelihood of complex, potentially malicious, scripting. The extracted URLs are related to XFA and Adobe, which are common targets for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

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
e907573a4777e3651861932d3f2cbb994b75ce33ab0dd04ef5f6a0be9bc45c9e
pdf-javascript-stream PDF /JS object 12 at offset 0xA1EF 3851 bytes