Malicious PDF — malware analysis report

Static analysis result for SHA-256 159f25effd63f755…

MALICIOUS

PDF

12.7 KB
MD5: 7207940378b95f3326e00870757dc7bd SHA-1: 4fa0565458415b9d96db7fb40211286ec9015a09 SHA-256: 159f25effd63f75539f8eec7086f1357c0475ab3d0502a8bbb9018844c295213
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD, and a critical ClamAV detection (Pdf.Exploit.Agent-6136306-0). The embedded JavaScript, although heavily obfuscated, is characteristic of exploits that download and execute further stages. The ML classifier also returned a very high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
32c662fb1d0db3ac9afbba39660f984ca526d68b477a7b36383c1e24b03163aa
pdf-embedded-script PDF raw stream script payload at offset 0x359 12304 bytes