Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a9db5f93aef5b4…

MALICIOUS

PDF

42.8 KB
MD5: 62d855e3ccff84d41e98fc38428a89bc SHA-1: 9efa238bc4d960e4cac47c228ff32f73357e2994 SHA-256: a9a9db5f93aef5b4a7efad2deaf4d88568b456e17710109db5c71a4705e676fc
156 Risk Score

Malware Insights

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

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36830. It contains an embedded script payload and an embedded file, indicating an attempt to exploit vulnerabilities within the PDF reader. The embedded URLs, while mostly benign or unknown, are part of the document's structure. The primary attack vector appears to be the exploitation of a PDF vulnerability to execute a malicious 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
f17b065ddacdf90aad1d96717c066bfbae69a755bab0293d8f1935e6e52a89b1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43112 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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