Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db5478e4ac6cfdc…

MALICIOUS

PDF

10.4 KB
MD5: ea1095cf65ebfdde296d827cccbae82d SHA-1: 5c65db4fa5e576d7f3a6a5fcfb4f95e84efab238 SHA-256: 6db5478e4ac6cfdc8d338da2004b3b0f8953f7656ee28542faf6eeba850528f7
110 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, for being obfuscated and containing embedded files. The presence of XFA forms suggests an attempt to execute code or load external resources. While no specific script content is visible, the embedded file and XFA structure strongly indicate a malicious intent, likely to download and execute a further stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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
  • 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/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
292e68f1fb39e4c474a3658fa25f53c1d3cface9d733875c3a83d2a2ca954c19		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x84 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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