Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ccebbaf4e7de59…

MALICIOUS

PDF

19.3 KB
MD5: d1025c5037cba783ce83950852926a2f SHA-1: 38ad713ccaaaa134e0a104d2687da0be762f713a SHA-256: a5ccebbaf4e7de59cff49977eefabe4bdae6bf54fcd2f8ba377272377a1e20e6
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection 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 embedded file object is a primary indicator of the payload delivery mechanism.

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
9666f5c26bffb5083a09022fececfb3c8676ac5eb0b5618c36cee38711999777
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18973 bytes