Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f633dd7cab67fad…

MALICIOUS

PDF

42.7 KB
MD5: 5146662ec5475be8d506020df415807c SHA-1: 72d66d38ade95950acdc32370ba5dce642eb9e7e SHA-256: 1f633dd7cab67fad82e7887e21a27809edd4a7c51f8537614d492cf5e70d8b9a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting the PDF is designed to exploit vulnerabilities or trick the user into executing malicious content. The embedded script, though obfuscated, appears to be involved in the payload delivery mechanism.

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
e5cbd7addb586a96f94441c5cdb7a61d8cf9310bc3e268bd1b98978a0f29b20b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42966 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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