Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52e66216464557a…

MALICIOUS

PDF

42.6 KB
MD5: 7012e105cbc5aaa7e370cd9df0da3342 SHA-1: a2590ef26fc149a1d74268a76cbdd80c8dd260c0 SHA-256: a52e66216464557a775d6d3b7b06bed9f59a3cb71245bba2aa06ac49e11bb0ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter

The file is a PDF with embedded script content, flagged by heuristics as a critical exploit payload. ClamAV detection confirms it as Pdf.Exploit.Agent-36830. The embedded script, though obfuscated, appears to be responsible for downloading and executing a second-stage payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The presence of XFA forms and embedded files further supports the exploit vector.

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
94778bf1fcb308732119a0190136a20cc354c5f3c7f0ea49c2547dd32fa40dee		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42849 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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