Malicious PDF — malware analysis report

Static analysis result for SHA-256 af72ddc7c12bb58f…

MALICIOUS

PDF

45.5 KB
MD5: e44c11da5cb8c59663198c2756b1395c SHA-1: a6af8abd9214efdec0a7bd5251a8c5b954d58444 SHA-256: af72ddc7c12bb58f3972f810e6dcc42dbba46b71679143794d7f975a8ad8df04
114 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 'Heuristics.PDF.ObfuscatedNameObject' and a machine learning classifier, indicating malicious intent. The presence of embedded JavaScript, identified as 'javascript_obj0012_000.js', suggests the document is designed to execute code. While the document body is largely unreadable, the combination of PDF structure, embedded JavaScript, and heuristic firings points towards a malicious document likely used for exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
9a8d958226dbed82195988a5188a6289e8ade6e2e0f4a3e07d78e9ccca5b2dd5		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1E5 3943 bytes

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