Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e652f5076954edf…

MALICIOUS

PDF

100.4 KB
MD5: 9dc17edd7590a324efa4d7835deadda3 SHA-1: 44341e9758a1d5d9e3a95c69f438ec9eacc4061e SHA-256: 1e652f5076954edff88cb304419f1078f9914ffe86afe9e24758408f0f0a034f
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.001 PowerShell

The file is identified as malicious by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it's a PDF exploit. The presence of an embedded script payload and XFA form further supports this. The embedded script is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery. The URLs extracted are related to XFA and Adobe, which are often targets for such exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
6868141e9dfdb55b4eba164f0213bd519f6f350fd339b7ccac2854c27105c762		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102044 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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