Malicious PDF — malware analysis report

Static analysis result for SHA-256 853c8026fa1081d3…

MALICIOUS

PDF

82.7 KB
MD5: 51f3564fd62f9809330a8977cf0a5c08 SHA-1: 1e10c4e2523322cea761a97f1fb9735b3e1c2676 SHA-256: 853c8026fa1081d38a6e42d4de86ccae4e0d33a67110a70f2694944394d8e477
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF utilizes XFA forms, a known vector for exploits. ClamAV detections indicate it's a malicious PDF, likely delivering a payload via an embedded script. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by obfuscation.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://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_00000246.bin
34f4f01cb30d57aff0d0b23eb64c43186af27690e8087002197ffbdee04725e2
pdf-embedded-script PDF raw stream script payload at offset 0x246 83929 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely