Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef507227fb885a1…

MALICIOUS

PDF

11.7 KB
MD5: 638dcb5131380fa2ad1dc32da088585f SHA-1: 901cb476232377105e7c34e7092f53b09e6fe149 SHA-256: 6ef507227fb885a14ee7200c1bdbbce26e6fbc195f9d1425e822bcf857018e5e
116 Risk Score

Malware Insights

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

The PDF file contains embedded script content and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The embedded file and script suggest the PDF is designed to exploit a vulnerability for client execution, likely delivered via spearphishing. The specific exploit and payload are not detailed in the provided evidence, leading to an unknown family classification.

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
209f851b44cd1be5c7caa3d86c59918956b8dbe3566ba129efa079d80563c4fb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11265 bytes

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