Malicious PDF — malware analysis report

Static analysis result for SHA-256 314351de2577e158…

MALICIOUS

PDF

19.1 KB
MD5: 5fe161d154398a3868e697f6aa24d1f9 SHA-1: a9c648042b8446d9c20b15bc6e39ec43fae2d478 SHA-256: 314351de2577e1583bcb499c15c70680d83932d1eda3b5e739153c51b1fd2a04
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this file as Pdf.Exploit.Dropped-78, suggesting it's a known exploit dropper. The embedded file and XFA form suggest a complex structure designed to conceal malicious activity.

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
3550cea05b906f7ae2eb865e84dc6d300d3a9c765117040ab1b5365bf5bcc9a4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18791 bytes

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