Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2de17c07fcfe64a…

MALICIOUS

PDF

12.0 KB
MD5: bd5f55a70632648bc95d8d18ef70a038 SHA-1: a5691c3101dcf73c59f43c78e96bf63fa1cab073 SHA-256: d2de17c07fcfe64a617ce1a0c35a6109052a44d46de65bd135aaff54c0cc3884
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 and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating it's designed to deliver a secondary exploit or malware. The presence of XFA form elements and embedded URLs further supports its malicious nature.

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
4b6b88aecd43ddda6832fd1f823a01bebb5b1381b982932ceb8a5f815b9fed3d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11565 bytes