Malicious PDF — malware analysis report

Static analysis result for SHA-256 09949c94ae9a2c82…

MALICIOUS

PDF

19.1 KB
MD5: ca89501ae1ce99cff5299ef0a13a6027 SHA-1: 7e3487b7ac215c14fafeeb8605d5d4403288274d SHA-256: 09949c94ae9a2c82238e9322d641fa6346241a72c80d631b927e2868012d630e
118 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains embedded content and XFA forms, suggesting an attempt to exploit client-side vulnerabilities. The embedded file 'embedded_file_obj0008.bin' is likely the payload.

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
022ca66562ac716951c6ddd8c8a9c32403c3ef8bda9716764a8627071b0b6e15		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18839 bytes

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