Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d50e74423f5b40f…

MALICIOUS

PDF

100.5 KB
MD5: ff5531e4e77de1e050a535d01ed67347 SHA-1: 61ad7bf424107af22f114a030942c4e3c3510ba2 SHA-256: 2d50e74423f5b40fdcb5ffd8a295051219d3d5c4cecb9680ea375272eed7f4da
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF utilizes XFA forms and contains an embedded script payload, as indicated by multiple critical heuristic firings including ClamAV detections for 'Pdf.Exploit.Agent'. The embedded script is likely responsible for delivering the malicious payload. The presence of XFA and embedded scripts points towards a common PDF exploit delivery technique.

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
39aea53cb829c4b2291c972456a64d0da750aa0dd8b575927981bd55869f8fdd		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102154 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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