Malicious PDF — malware analysis report

Static analysis result for SHA-256 281f614bbdc59c36…

MALICIOUS

PDF

186.5 KB
MD5: c45f588c6af303ac4d437924e9377728 SHA-1: e8ae3531bb0abb34f9e5873404322f1af42e4aca SHA-256: 281f614bbdc59c36ed6d7be10203b4008e70493619f811530f94ff2198661594
86 Risk Score

Malware Insights

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

The PDF file exhibits multiple heuristic firings related to JavaScript and obfuscation, including a critical ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject'. An embedded JavaScript file was extracted, which is a common technique for delivering second-stage malware. The presence of JavaScript actions and streams strongly suggests the document is designed to execute code upon opening, likely to download and run further malicious content.

Heuristics 6

  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
c80156db95d7286a3978a7591787703265d5e5d102669b94f77cfcf9027a3493		 pdf-javascript-stream PDF /JS object 12 at offset 0x2DEEB 4713 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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