Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54d92149f85b5b4…

MALICIOUS

PDF

18.7 KB
MD5: 45ea2d4cbf8b2891bdba5f186b7ab243 SHA-1: 8761229e24b1801ef95cc9f02ab5d372b9dd2c63 SHA-256: f54d92149f85b5b4c249346b98f878b9bfb6aac4a500af1d5fc24245b31799c5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded content and a script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded script likely attempts to download and execute a second-stage payload. The document body is not informative, but the presence of embedded objects and scripts points to a delivery mechanism for further malicious activity.

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
ee8638861e491c322f10343e94dd833224d5c9c3a5769b308477250458f16fce
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18338 bytes