Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9684f9329d86a5…

MALICIOUS

PDF

42.4 KB
MD5: 7aeab3036e7493a34a0d825280f3a825 SHA-1: 673cee42ade1f20e97c8ab0fb951aa400152a793 SHA-256: 2e9684f9329d86a5135f4eae7d6e18718c4aab679e5223ea90452a43ee5ebed6
156 Risk Score

Malware Insights

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

The PDF file contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ClamAV detection 'Pdf.Exploit.Agent-36830' strongly suggests this script is malicious and exploits a known vulnerability. The embedded file artifact further supports the notion of a multi-stage attack. The script itself appears to be obfuscated, making a precise determination of its actions difficult, but it is likely designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
544d83eb43144cd97d39698f80daa1a26f5bed3a5653a9c8378a701a65c19e8d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42708 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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