Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e51e53a5fe7cef…

MALICIOUS

PDF

12.0 KB
MD5: 56aa40582855817c28b354a70c20730a SHA-1: 02c2e0d3715ca43bad584916a13829912b765ae2 SHA-256: d7e51e53a5fe7cef1188ccf55223362221df760eb3e2ad64f379f1f1c0a1febb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this file as Pdf.Exploit.Dropped-78, suggesting it is a known exploit. The embedded file artifact, embedded_file_obj0008.bin, is likely the delivered payload. The XFA form and embedded file heuristics further support the exploit 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
36627bb64a3141d7e71e4fcef012d9efd7b5b262f4adf60038502f98e4149104
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11502 bytes