Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01ca0eefc276b4e…

MALICIOUS

PDF

19.0 KB
MD5: e545fc1f85570a882c5b1a81b51232b5 SHA-1: 9dfa3ad893a569b7dec6cb624ba7cd73b6bb40a7 SHA-256: b01ca0eefc276b4e3a22aad492fc4aef69b23b979cc9b388b2583a64111b65e7
130 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with high confidence. It contains an embedded script payload and an embedded file, indicating it's likely a dropper or exploit document. The presence of XFA form elements and embedded scripts suggests an attempt to leverage PDF vulnerabilities for payload delivery.

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 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
1753aa4f2732783b96b7485a65a8070e025f06dd9f348d59e501fd001a6bf21a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18707 bytes

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