Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc86dbdc67b0bbd…

MALICIOUS

PDF

100.5 KB
MD5: 92253874e70f0156e93d10fb445f3b37 SHA-1: 846e09cfdc8ced6def6f9bcd0df768784f2e3319 SHA-256: dbc86dbdc67b0bbd42acd161f19e15b14e2c9f84f7d7f048908557a98b7e37cb
148 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and triggers critical ClamAV detections for PDF exploits. The presence of XFA form elements and embedded script markers suggests an attempt to leverage PDF vulnerabilities for malicious purposes. The embedded script is likely responsible for downloading and executing a second-stage payload, as indicated by the ClamAV detection names.

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_00000246.bin
bb27768018c98c0f0a25871c3e11b59481a04fd707c9e629563367862999b6df		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102156 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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