Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd3b6d13c7f5d41…

MALICIOUS

PDF

79.1 KB
MD5: 3aa48c511b58d7b7af96648163b6b9ba SHA-1: d5192cdd6da4c6f9fd666516c3b80b568bc25c5d SHA-256: 1fd3b6d13c7f5d41de00d95c9f79b0b6d90cd12b995a57f8299be0899f47a3fe
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form, which is a known vector for exploitation. ClamAV detections indicate it is a malicious PDF exploit, likely delivering a second-stage payload. The embedded script payload, although not fully detailed, is the primary mechanism for this delivery. The specific exploit and payload are not further identifiable from the provided evidence.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://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_pdf_script_0000023e.bin
57b0957215e42c7a407613fa450582f31621b46cf9180e4d74b7c5e454f32c91		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80299 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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