Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e6a2fee28a3cd1…

MALICIOUS

PDF

2.5 KB First seen: 2026-05-11
MD5: e1fb8a0c9981df9461d1758d7e2bc6e4 SHA-1: 5a08cfcd30972ed5098e210e750dd073373954f2 SHA-256: d9e6a2fee28a3cd1250e57950caeaf1d1485d68d55b19399a8ac389b9aab0ca5
88 Risk Score

Malware Insights

MITRE ATT&CK
T1557 Adversary-Controlled Infrastructure T1204.002 Malicious File

The PDF was flagged by a machine learning classifier with high confidence as malicious. Static analysis revealed an embedded file, which is a common technique for delivering second-stage payloads. The ML_NYX_PDF_MALICIOUS heuristic and the presence of an embedded file strongly suggest this PDF is a malicious dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Suspicious extracted artifact high 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 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/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 12914 bytes
SHA-256: 80dee768e01e4dbca9a9448f7e016f4a095ea57a3bdc7b645e454d90b849aadc
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x592 8248 bytes
SHA-256: 662dcc319e8d7fa8b399e72ff306e24c8ce30a98189cedb600b0679dcf1c866c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis decoded payload bytes; decoded SHA-256: 6e0089be691d6cb0a48dceebfd62d506a3fb1bdc98a5adb064a17f2752795826 Static shellcode analysis recovered command string(s): cmd /c C:\Acrobat.exe
xfa_image_rawvalue_000_shellcode_00.bin pdf-xfa-tiff-shellcode x86-low-nibble-pair decoded from XFA TIFF payload near offset 0xCC4 3203 bytes
SHA-256: 6e0089be691d6cb0a48dceebfd62d506a3fb1bdc98a5adb064a17f2752795826

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