Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6c308e47627ee6…

MALICIOUS

PDF

12.0 KB
MD5: b4a4c26dd5d116968883a910a1fea35e SHA-1: 55597df6e76aaa175caaee8251897188f38bcfb3 SHA-256: ca6c308e47627ee62095577a543e46491803944b12f780d2cda1ef8d719bfa63
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 high confidence and detected by ClamAV as Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating it is designed to drop and execute further malicious content. The presence of XFA form elements and embedded URLs, though some are benign, are common in exploit-laden PDFs.

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
25a1ee1ee906798880a21634ee9a3b73280590d25b50bd8a1b8968c9ffc0f6aa
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11581 bytes