Malicious PDF — malware analysis report

Static analysis result for SHA-256 50137428a98c5f4d…

MALICIOUS

PDF

79.4 KB
MD5: 9b05225f3005b9d2e1a2497593d42b58 SHA-1: 3e6fc787700c77425b49cca456e7d3dd6a585244 SHA-256: 50137428a98c5f4d20a5758bdecff63b03f3726fd2c15ffb6a200c83c051ef52
118 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection. The presence of an embedded script payload and XFA form suggests an exploit attempt. The embedded script is likely responsible for delivering the malicious payload, although its exact function cannot be determined due to obfuscation. The embedded URLs are not directly indicative of malicious activity but are part of the PDF structure.

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
fcc1ec4c57df85361dc6d942e126a3512736468ff67df737da548411e62837e3
pdf-embedded-script PDF raw stream script payload at offset 0x23C 80624 bytes