Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d83db1d9fc50938…

MALICIOUS

PDF

10.4 KB
MD5: 4d77b67b1ecb41302ca46f1b12ff7b37 SHA-1: 120c9f5bdf0049b39eea915868195e1a57c7498b SHA-256: 5d83db1d9fc5093889ed5193bd7036713c717828d70f1f1c3de9c0cf3ceb42b9
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains an embedded file, which is a common technique for delivering secondary payloads. The presence of XFA forms suggests potential exploitation of related vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
671018c56dcc17df76a411be401eb454311985554734eaf9aa65a934478977d8		 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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