Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1447782d1653ff0…

MALICIOUS

PDF

18.7 KB
MD5: ced59cdf3b4a6bdc504261fa7bdd7562 SHA-1: 39890f6cd1d64a7571474f8eac1128040f3f2051 SHA-256: b1447782d1653ff01879a1c94811843a9f99a18edfde6fb1fae72629a0e6be10
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting it as Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and drop further malware. The document body content is obfuscated and does not provide clear user-facing lures.

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
baef6c9a21423f4da3d72297ccc5c5e1cd289147ed12ec205b49f90a8de4295b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18366 bytes