Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6a9a25fa691bcf…

MALICIOUS

PDF

14.6 KB
MD5: 66b4d6099f1ddb5150e3cb00325c8a7c SHA-1: 6917a81b6154a88e2319aca46e97f5dd88d16cac SHA-256: bf6a9a25fa691bcf28f5ab7db47c69585cd98a7feda010eb879127046034559d
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file contains an embedded script payload and utilizes XFA forms, indicating a malicious intent to exploit vulnerabilities. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a second-stage payload.

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
469d16930bf69695c4f74b961f4507185e5318a000c07f5eaa91e72c707f013b
pdf-embedded-script PDF raw stream script payload at offset 0x329 14241 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely