Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1939cf6a383d5b…

MALICIOUS

PDF

14.6 KB
MD5: 64e3b51c7f554df1212b4151d0079557 SHA-1: 546274d0b098da1ad086956469cc64451b979309 SHA-256: 8e1939cf6a383d5b5518201846b256913e73d70ebe2093e0fa7b2026575d4760
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains an embedded script payload, as 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, although its specific actions are not detailed in the provided evidence. The presence of an embedded URL further supports the delivery mechanism.

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
4dd4b036dc779717c1e5f1618034def0f4c7deeb499c65a0823d4b16b3129606
pdf-embedded-script PDF raw stream script payload at offset 0x329 14266 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely