Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0dc95a885a2732…

MALICIOUS

PDF

12.0 KB
MD5: de6d87c90493da5ed8b8ce0e5417c90c SHA-1: 0eeb40149073bedd6b59451d40e966641cf5ea4a SHA-256: 4e0dc95a885a2732d4b5135068e0a2e21f8665a40310ba7eaed83b8d24d222ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). The presence of an embedded script payload and an embedded file suggests the PDF is intended to exploit vulnerabilities and download a secondary payload. The embedded URLs, while mostly benign or unknown, are part of the PDF structure.

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
bdbd322701442bb9cb3a9aef4f8879e71318ca153bc0b8fad4f0101edeb83613
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11524 bytes