Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf490809ec498194…

MALICIOUS

PDF

12.1 KB
MD5: b73ae891e2b9072d3ac1e0d4a5e411d2 SHA-1: a1b787a1f21fdb55f59bd182b433b85b34b4ad1b SHA-256: cf490809ec498194e6ae5a99d07b150565b14e2dbda8549a553222bf87341091
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious Attachment

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is a malicious exploit. The presence of an embedded script payload and an embedded file further supports this assessment. The embedded file is likely the delivered payload.

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
cca0fec99ed8dd4ae31899087285fa5ad47ff2c7203a9422cfbe1cfcec1f374a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11675 bytes