Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7c0bf90c99f81c…

MALICIOUS

PDF

12.2 KB
MD5: cdfd26b6de434fb5e067f0744653c02d SHA-1: fac175b26357c00091b99b750173bf8e286affa7 SHA-256: fe7c0bf90c99f81c9dee8c63fd8b48fe05c8d3411855cef1f6e71b5df689de75
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV with a critical detection for being a malicious exploit dropper. It contains an embedded script payload and an embedded file, indicating it is designed to deliver a secondary malicious component. The presence of XFA form elements and embedded URLs, while some are benign, are common in PDF-based exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
2f8754608d76897bb10431a1b6308b9a3c7fb9a1b97aeb99c89861e42ee117d5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11707 bytes