Malicious PDF — malware analysis report

Static analysis result for SHA-256 0441f8c7f96c3929…

MALICIOUS

PDF

26.4 KB
MD5: e95bc8d428ddfd8354b79fb58b2701c7 SHA-1: 77642e8a99b3a3c3b3b72b3b98009bfe748a2ffa SHA-256: 0441f8c7f96c392906b0d165a63650511bb19a24a300eaa87c94533d934b2d77
118 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it contains exploit code. The presence of an embedded script payload and an embedded file suggests it is designed to download and execute a secondary payload. The XFA form and embedded script point towards JavaScript exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
3eca8e0f723e527a34d358e0c0d2c07bbd1c4ba29101f67925801fd64620ef82		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26283 bytes

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