Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0128ff69f87fbe5…

MALICIOUS

PDF

42.5 KB
MD5: d5618fd0d0d265b8ab23a506f30942f3 SHA-1: 385f26ac7ce21c1cda69f32eef6cd801e7e8cae2 SHA-256: a0128ff69f87fbe5941f922396bc317e0d68e27c6960956c72da998de492a332
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains a malicious exploit. An embedded file was detected, which ClamAV also identified as malicious. The ML classifier output of 0.999995 strongly suggests a malicious PDF exploit.

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 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.
  • 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 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
7a1f538fa7189c0b96dd57b3e9ff75023c977e2e55a9075dfd589a831d2a50f5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42812 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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