Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfa27acdc1f1f0b…

MALICIOUS

PDF

11.7 KB
MD5: cc9221b85e828f80ee7f2706311f42af SHA-1: 9bdccb0e714f11a6f4fe7b0cfa3e673f46364b67 SHA-256: bcfa27acdc1f1f0b5c625f09bca044f899bd3159daeda6b03b8dc8c085bf4c86
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further indicates malicious intent. The embedded URLs are benign or unknown, and the document body content is not indicative of a specific lure.

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
fd3ce565e71198eaba364a8475bfabc1afff69019fb54691cd1a1dd28af999a5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11234 bytes