Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acbc2945acc0a8b…

MALICIOUS

PDF

101.2 KB
MD5: 0a1914ef9b314ac166bb152f16de5209 SHA-1: d4d108a50f3fa58a684e735e1757fc4b456ac44e SHA-256: 6acbc2945acc0a8b9e208ae2b3597228626668741c9a7282efaf8cad4efd8dc7
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains XFA form elements and an embedded JavaScript payload, strongly indicating an exploit. The JavaScript is heavily obfuscated but appears designed to download and execute a secondary stage. ClamAV detections further confirm its malicious nature, classifying it as Pdf.Exploit.Agent. Given the lack of specific indicators for a known family, it is classified as unknown.

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low 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 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
6065767c70be7ccdc4e5af506c3bdfd1aaf430c624eda01f185f321652fad290		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102936 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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