Malicious PDF — malware analysis report

Static analysis result for SHA-256 5932c9fcdb21c503…

MALICIOUS

PDF

10.5 KB
MD5: eb128f4dcc19851f8cc5f132fee7dce5 SHA-1: 43bed76ab28a6e5a2584cca7f78fb0261e02a852 SHA-256: 5932c9fcdb21c50395c16fcd5f5e11be34bdec4f704a64b7d18d313451a64657
108 Risk Score

Malware Insights

MITRE ATT&CK
T1553.005 Mark-of-the-Web Bypass

The PDF was flagged by a machine learning classifier and ClamAV for being obfuscated and containing an embedded file. The embedded file, named 'embedded_file_obj0001.bin', is highly suspicious and likely contains a secondary payload. The XFA form and embedded file heuristics suggest a delivery mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
a67d6f02a2fe6be2dddb2f45da4cfb84cdcd32af95e147beb819c2764e1efad6
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x88 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).