Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca8cf0cf39cbf0e…

MALICIOUS

PDF

79.4 KB
MD5: ab66ad9b506e711b1438afcb507e7dfe SHA-1: 198f8af1d5886c6e4e3875ce3801f0828ff4fd2d SHA-256: cca8cf0cf39cbf0ed90e2128c070b684225d10b47fac48a3be8e2ea6566c930c
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is identified as malicious by multiple high-confidence heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-6136306-0' and an ML classifier. The presence of an XFA form and an embedded script payload indicates a likely exploit attempt within the PDF structure. While no specific script content was provided for analysis, the embedded script marker and XFA form strongly suggest the PDF is designed to execute malicious code upon opening, likely leading to the download and execution of a second-stage payload.

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
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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_pdf_script_0000023c.bin
2f92eb7b3e97c82c5171131d43aba54024997a699a6a99545fe6c2ce73f61fba
pdf-embedded-script PDF raw stream script payload at offset 0x23C 80620 bytes