Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a91a0f67a2c243…

MALICIOUS

PDF

18.5 KB
MD5: 7fe0b727057c477cb879802496421507 SHA-1: 05ec0298920e9f614b6d753fbd10ffc87338f206 SHA-256: e9a91a0f67a2c243ba490b8cbff5b3c85b0995b7ea4d48b57829157e0ddf0842
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded script payload and utilizes XFA forms, both indicators of malicious intent. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36789 and on an extracted artifact as Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a second-stage payload, contributing to the overall attack.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
  • 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.x&#102;a.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000325.bin
7e55a11b791cad0e0e0e0deaeab7460fa7ae48e3e8276412070ccf82616b8405
pdf-embedded-script PDF raw stream script payload at offset 0x325 18180 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely