Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca0a4d6fcce65e7…

MALICIOUS

PDF

42.7 KB
MD5: d3ee9d7787a8b28ed4a01110968af6a5 SHA-1: 5c7e36b76c31aeefe42659d1789efb4e5bce17d1 SHA-256: aca0a4d6fcce65e718a49d9e7aebbcedcd097a5f9d64139c7a9eac1c20d70fb9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is 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 part of the PDF's structure. The exact payload and delivery mechanism are not fully discernible from the provided evidence, but the overall pattern suggests an exploit attempt.

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
7acd7103ff39749cf1ae7770d72e57edf74255e42bd704c30eedd796014efd87		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42934 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.