Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e947cd5cb11da8…

MALICIOUS

PDF

12.0 KB
MD5: dfee77fef490c1015e26f97c5dfa97c0 SHA-1: 6831fff8e183884b17818cacb2fba2d874558eae SHA-256: 64e947cd5cb11da87f64c9104d8dd934807b8e148887fdec93e9b4ab6c67e8fa
116 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple engines, including ClamAV and an ML classifier, indicating it contains an exploit. The presence of an embedded script payload and an embedded file suggests the PDF is designed to drop and execute a secondary malicious payload. The benign URLs present are likely decoys or standard PDF schema references.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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
c74bdf19655df6b22d43d0dd7fbe8089558416b78e7c03bc3b366d80c6b8ba13
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11546 bytes