Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87e38e26034ada8…

MALICIOUS

PDF

45.2 KB
MD5: 7639b05d6556ff62f152d6502dcbd17f SHA-1: 0e44545ce564a5335077fe854ba36d0581fc2aa4 SHA-256: a87e38e26034ada8b9dff3d3a49caf51227e7ed2cf73ce5abe8103870fe2b7a7
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV for obfuscated objects, indicating malicious intent. Embedded JavaScript streams were detected, suggesting the execution of arbitrary code. The presence of XFA forms and JavaScript actions points towards exploitation of PDF vulnerabilities to deliver a payload. The exact nature of the JavaScript payload is unclear due to obfuscation, but it is likely designed to download and execute further malicious content.

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
04ebc932bf19d15cb7b4cc68f3b6d2ab325412e09daf073582cc4d1124f7e055		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F0 3571 bytes

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