Malicious PDF — malware analysis report

Static analysis result for SHA-256 1011e71ad3e9d11e…

MALICIOUS

PDF

2.9 KB
MD5: fe160a934cf45b0a9819ada0d0d36ec5 SHA-1: a2eedd829afd173035bb6cc70b7f37dfb630ae16 SHA-256: 1011e71ad3e9d11e7c0de99298b3b511aa3aedde14adf9b1b0b4aff429d2bc59
108 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically for obfuscated objects and XFA form usage. The presence of an embedded file suggests it's intended to be extracted and executed, likely as a secondary stage. While no specific script content is visible, the XFA form and embedded file indicate a common pattern for delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
8faac442ded96d6638af417ef82d424df5977f863471c1313f1e75e7db6b0a33		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x88 13569 bytes

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