Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca2bb5f75d6d4cc…

MALICIOUS

PDF

42.3 KB
MD5: fb9871dcee9bc193110b709af4200028 SHA-1: cd410f873977f0afdc6b7346ed432a20b2de6a71 SHA-256: 7ca2bb5f75d6d4ccb818820f5533b4429f30961df605d89ae3edf75be8772bb3
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it contains a malicious exploit. The presence of an embedded script payload and an embedded file further supports this assessment. The embedded URLs, while not directly malicious, are related to PDF and XFA specifications.

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
2adbcac5de3f36927f09467a1f7617fdf2213a48e0ca546f4cc489231fcbca4c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42573 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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