Malicious PDF — malware analysis report

Static analysis result for SHA-256 444320a8d3e3b570…

MALICIOUS

PDF

14.6 KB
MD5: 5210526c6819f9fe7bd65a816e20fd51 SHA-1: 3062a7e67064c5ea9ffd1a57f210e93aabe221a3 SHA-256: 444320a8d3e3b57068b425c36f8b0219b1146b46a5ed6cf5a1824fc69a0faab3
148 Risk Score

Malware Insights

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

The PDF document contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detections (Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809) confirm its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, a common technique for delivering malware. The presence of XFA form elements also suggests a potential attack vector.

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000329.bin
7194b69a6d14a69fcb59108fbad75649f20b22c9a404a41111629b58e4c08dcc
pdf-embedded-script PDF raw stream script payload at offset 0x329 14215 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely