Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e23b28b674de18…

MALICIOUS

PDF

11.9 KB
MD5: 1abadcd1542666d6aa5cf5d5876bbe5a SHA-1: 9a81079429b2835fb9850089ed31e77d6019d117 SHA-256: f9e23b28b674de18439d32adeda169e98bb98952e518e92d00444ee8d69149ef
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Exploit.Dropped-78 and a machine learning classifier with high confidence. Heuristics indicate an embedded script payload and an embedded file, suggesting the PDF is a dropper. The embedded URLs, while mostly benign or unknown, are part of the PDF structure and do not directly indicate malicious intent on their own. No scripts were extracted from this sample, limiting the ability to determine the exact payload delivery mechanism.

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
180bac0d9ed2e324770dbed5a52712895aa5e63364691d711303e2873bef417c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11441 bytes