Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd9da0d34769896…

MALICIOUS

PDF

19.2 KB
MD5: f9f7adab364b5280fda72332e91c3d0f SHA-1: b880e24fe32b79ef49e68b35ec7140bf45aa3807 SHA-256: 8dd9da0d34769896d11e56e209ea87ff7aa8bcf031c6376a6487bcc643b64c43
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 ClamAV detected it as a known exploit. The presence of an embedded script payload and an embedded file indicates the PDF is designed to execute malicious code and download further stages. The embedded URLs, while not directly malicious, are part of the PDF structure.

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
6f0fefc3c7540e9c1bb091b04e9aeb33a71f0531f780f49ba1e97c3ccc6890f1
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18910 bytes