Malicious PDF — malware analysis report

Static analysis result for SHA-256 8822b0503226866e…

MALICIOUS

PDF

12.1 KB
MD5: f4f7024cd12dc681855443b1d6c2f231 SHA-1: 684ac7ce3938f73a6679a42196b53f3cbd72e9b6 SHA-256: 8822b0503226866e1181bd059fe1e36ac2648f67c0da6b7f90fec4e3e435ee20
116 Risk Score

Malware Insights

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

The file is identified as malicious by 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 deliver a secondary malicious payload. The benign URLs do not appear to be directly related to the malicious functionality.

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
88bc1822d2bfe9df0b82987040bea9e4f617b6c85ce240f52f231ed4c2a55aec
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11623 bytes