Malicious PDF — malware analysis report

Static analysis result for SHA-256 1971949dc9ac9e86…

MALICIOUS

PDF

12.1 KB
MD5: b280b9a3045b9d156454c43e5f8dbeb9 SHA-1: 1f2f40215d3c5b2c31b03c5e59d2c8b271963655 SHA-256: 1971949dc9ac9e86e1ac57ac0d9624346fa0c03083d985674b25d49e72e1a30d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, which identified it as Pdf.Exploit.Dropped-78. It contains an embedded script and an embedded file, indicating it is designed to exploit vulnerabilities and download a secondary payload. The embedded file 'embedded_file_obj0008.bin' is a key indicator of the dropped content.

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 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 script payload in PDF stream low 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 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
084b1fabd87e8a4c115da9584e8ca6f587a396ec578457f1ac559cb9701ca4da
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11595 bytes