Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1c971cec31d38a…

MALICIOUS

PDF

11.8 KB
MD5: c61e2449637b38b3236ad6e5ecd826e2 SHA-1: acf8db5ce099050148f849ac3e73ae3af05a3de5 SHA-256: ba1c971cec31d38a477c148f70bd747982020348418000f25bf0ab6e4e861b2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier with a high probability of being malicious and was also detected by ClamAV as Pdf.Exploit.Dropped-78. The presence of an embedded script payload and an embedded file further indicates malicious intent. The document body contains obfuscated content, suggesting an attempt to hide malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
98ddbe0d24a5670cc039df995f78661d7ceb1ffa3bfc0e3fe8840329ffd9479b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11325 bytes