Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed5972126483f16…

MALICIOUS

PDF

18.5 KB
MD5: 49ba74468f7ddd87c35ef07ab3789c52 SHA-1: dbdc08327716bdb829183d88ff455a0173d37ad2 SHA-256: 3ed5972126483f16d646107221cebe4824f42ae6288a1123ffafb5562122d91d
148 Risk Score

Malware Insights

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

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. The presence of an XFA form is also noted.

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
8b53228437f85adc9bc6af3ebbda7d6c3dedf091282eda4c014fb898a1cc4841
pdf-embedded-script PDF raw stream script payload at offset 0x329 18264 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely