Malicious PDF — malware analysis report

Static analysis result for SHA-256 107e8ef95ce65715…

MALICIOUS

PDF

42.8 KB
MD5: 94edcef4529aea27c9d5de4e49ff61ca SHA-1: 47deaee04b6884a8f951ccc94056edf2feb32cc0 SHA-256: 107e8ef95ce6571559d605e0ee2fefe134851a69b39dcb83292bf99a49c47b99
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains embedded script content and is flagged by multiple heuristics and ClamAV as malicious, specifically identifying it as Pdf.Exploit.Agent-36830. The embedded script, likely JavaScript given the PDF context, is designed to exploit a client vulnerability, leading to the execution of malicious code. The benign URLs present do not detract from the malicious nature indicated by the exploit and detection signatures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
856ced9820717e5f893f479a0203dd34dfa47ca856ec06ffedd82f884d276838		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43109 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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