Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f24c7950b2a6f81…

MALICIOUS

PDF

12.1 KB
MD5: fab1f10bf52961f2661f4b0fb08efed1 SHA-1: 3ec7cbbf6524586b2b9941e9de67753b1f097d5f SHA-256: 4f24c7950b2a6f81a065bfe02079b3503ec587f4dc09bf0b062996613642ec8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it contains an exploit. ML classification also strongly flagged it as malicious. The presence of an embedded script payload and an embedded file further supports its malicious nature. The exact exploit mechanism and payload are not detailed in the provided evidence, but the overall pattern suggests a typical PDF-based exploit delivery.

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
b2ef58a19900bde4e5cf7fabbd738b027a63ff56c37ff24b699758a499de15cc
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11654 bytes