Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bc4bcc66fec8f4…

MALICIOUS

PDF

42.7 KB
MD5: 2420b05168a0dce47d58e2be57b50aa4 SHA-1: 7b12109d10464aa08647ec3adf0b2fbc3c808222 SHA-256: b3bc4bcc66fec8f4098441f14bcdd5b37d7ea00f3d9abab452cb843d7a0ef0a9
188 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is a malicious exploit. The presence of embedded script payloads and embedded files further supports this assessment. The embedded URLs are related to XFA forms, which are sometimes used in PDF exploits.

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
1d23f201e7f1d9603b9befd472c7705bd29a5a879c50e479a073b606ce111971		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43019 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.