Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12c436aa2814977…

MALICIOUS

PDF

18.7 KB
MD5: 1b49aeaa69271a67ced12f57dbba0481 SHA-1: 8db1d9e500d52ac8fff8d8c0dccc6d857998fe2e SHA-256: c12c436aa2814977d30355a89b0cf82b2d5c5e8bd330c32fcf980f333197bdd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution - Malicious File

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the high ML classifier score strongly indicate malicious intent. The PDF contains an embedded script payload and an embedded file, suggesting it is designed to exploit vulnerabilities and drop further malware. The embedded file artifact is also listed as a potential IOC.

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
46c23a710dc9a5559a66315e1af049410f5f1c51cb403c8e8816cca045b7ba64
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18357 bytes