Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b288be8efbacae…

MALICIOUS

PDF

12.3 KB
MD5: 1d9036341fc758775d5dde606345f307 SHA-1: 41e2e88686d631d67ab8109a1965337eb32ae71f SHA-256: 64b288be8efbacaec937ca7e8429c25e3f5149aee72a96b26827328f42479a86
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded content and is flagged by ML classifiers and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. The presence of an embedded file suggests it's designed to drop a secondary payload. The benign URLs found are likely unrelated to the malicious functionality.

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 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 script payload in PDF stream low 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 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
81e8184ba3c5d899800037cf09e6bf81de41fc59e30ce533478d9012fc7f5b0e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11861 bytes