Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc2e48af1c5aa3c…

MALICIOUS

PDF

11.7 KB
MD5: 8f9e25f672aa3c61243982c0bfb1d1c0 SHA-1: 204a1027bc7749a6f264f74f867cb328b404eaf9 SHA-256: 7bc2e48af1c5aa3c9fb4eef9d20cf033aefda3b24a3217317ee19960fb880e38
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, a common technique for delivering malware via malicious documents. The presence of XFA form elements suggests a potential exploit targeting PDF reader vulnerabilities.

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
c157f044f56683b65cb02234ae6663322d5ece14bf36193b57bac16aa6544725
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11180 bytes