Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc26816415d6ad0…

MALICIOUS

PDF

18.7 KB
MD5: 424b58e72b30576fb4aedee94a1dda95 SHA-1: e8f1ca13d9e088779817f1239e7252c5c18a9fac SHA-256: ebc26816415d6ad0d4b041aea42cc760962f9a7c950509b1fd5abb5f3dbf2d27
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The critical ClamAV detection and the presence of an embedded script payload strongly indicate malicious intent. The PDF structure, including XFA forms and embedded files, is consistent with exploit delivery mechanisms. While the embedded script is obfuscated, its presence suggests it is used to download and execute a second-stage payload. The embedded file artifact further supports this, likely containing the dropped payload.

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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
d983d92daba9b4dea115ab251202da98c8a799886b9fe5b43c3dc82f4b32eff6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18390 bytes

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