Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9845e003532a18…

MALICIOUS

PDF

19.2 KB
MD5: d82ddfb0bb5dd2c3c3cd601130954304 SHA-1: 2e87497d5784926df402258389cf3fd373fb1615 SHA-256: 7e9845e003532a1854cd268a2ad735222f97856d8894af163b5191308639e371
116 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including critical ClamAV detection and a high ML score, indicating malicious intent. The presence of an embedded file and script payload suggests it's designed to exploit vulnerabilities and download further malicious content. While specific URLs were benign, the embedded file itself is a primary indicator of a dropped payload.

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
56fcc2b8bf79bde18d1b914c461f9066fafa4341ace2e3f34b906a15adeec04b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18890 bytes