Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a3e09d9bd02488…

MALICIOUS

PDF

42.2 KB
MD5: 337e2b5c26e5916ebf0a37a31362b426 SHA-1: 2c1f15c9c2533e57557172ef31890543ffd40cbf SHA-256: 25a3e09d9bd0248828ff09ae92409e0ca7e97a9463a71a718ae693aadedb13a0
186 Risk Score

Malware Insights

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

The file is identified as malicious by multiple high-severity heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830'. The presence of an embedded script payload and an embedded file further indicates malicious intent. The ML classifier output of 0.999995 strongly supports the malicious verdict. The embedded artifact is also flagged by ClamAV.

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
037313e5a28c939babec292925d90025510e73f3ffbc37202ad02e1d364178d0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42437 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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