Malicious PDF — malware analysis report

Static analysis result for SHA-256 21011b88135bfd14…

MALICIOUS

PDF

216.0 KB
MD5: 098a67a74b219f73166f5bcb56d5b196 SHA-1: 57b51009ea496b70e9ce04f4d670ef8121732fa5 SHA-256: 21011b88135bfd143e2480f215baf11016516aa3552e5c9606b6e61954559947
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits multiple heuristic firings related to JavaScript and XFA forms, indicating a high likelihood of malicious intent. ClamAV also flagged it as Heuristics.PDF.ObfuscatedNameObject. While the document body is heavily obfuscated and unreadable, the presence of embedded JavaScript suggests it is designed to execute malicious code. The specific JavaScript stream (javascript_obj0012_000.js) is the primary indicator of the attack pattern, likely serving to download and execute a second-stage payload.

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
dee17595e76b7d8c18e2c7d5fe19da1b7fc07174ec72d3b65050172e56eb7eec		 pdf-javascript-stream PDF /JS object 12 at offset 0x3540A 6262 bytes

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