Malicious PDF — malware analysis report

Static analysis result for SHA-256 44621f86930cb00b…

MALICIOUS

PDF

11.8 KB
MD5: efde9b818391985ee382f57d815ac7ec SHA-1: 12614fb9004a5b605076c7ea9e1a60f7d38252dc SHA-256: 44621f86930cb00b7adf6dc319450b95db8ba7e26fc2a9b410ab71ba59f2f612
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78', indicating it contains an exploit and is likely a dropper. The presence of an embedded script payload and an embedded file further supports this. While no document body text was available for content analysis, the technical indicators strongly suggest a malicious exploit 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
2b492c26bb5fb3a25147e66a93a9777b73da7b81ce8f6a7070c823a4d6468b37
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11351 bytes