Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5384d251c7552…

MALICIOUS

PDF

45.1 KB
MD5: a9076f80075a67c31b2427836bd2a83a SHA-1: 8887e60a8afeacad1adc5f1b610f5107316a6260 SHA-256: 53e5384d251c755261a3008cc7e3a546c7a7f4f37d0aff92a54a185d262db93c
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript points to an attempt to execute malicious code. The exact nature of the script's execution is unclear due to obfuscation, but it is likely designed 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
27e7ca8b0afe5e7ffaf753d0700aff0b734f6ba362d92b51d54de2d11baf164b		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1EC 3501 bytes

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