Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b6ed0372e2befa…

MALICIOUS

PDF

18.9 KB
MD5: 4bb5837733fc9554c88f1d729e90f31e SHA-1: c6cf681a48af632bbdb701078bb51b5391c86726 SHA-256: d3b6ed0372e2befa43b3a793d9ba9cf48e14e94f290690c9345b4063c3af0990
96 Risk Score

Malware Insights

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

The PDF file contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this file as Pdf.Exploit.Dropped-78, suggesting it's a known exploit dropper. An embedded file object was also identified, likely containing the malicious payload. The exact nature of the exploit and payload is not fully discernible from the provided evidence, but the presence of embedded scripts and exploit detection points to a malicious delivery mechanism.

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
7accf32f52574be7e1f30804acb9e3b1d59048e8db2ae43bb0189d30fb59da6c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18607 bytes