Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10b6a5da745c0a6…

MALICIOUS

PDF

11.8 KB
MD5: 4244a6afdf36b2e7921002ba2d126562 SHA-1: f821157dac6d851472fbcfb0a09d8b295634589e SHA-256: d10b6a5da745c0a6cc6eec36e35367edcfd15e10673f6c6efd8acd28eb86afa3
96 Risk Score

Malware Insights

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

The PDF file contains embedded content and an embedded 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 URLs, while not directly malicious, are part of the PDF structure. The primary attack pattern involves exploiting the PDF format to deliver a secondary payload.

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
aecc768eb9b81bdb78ad3065638a7fdb222494dcf53a19c1eff03d04ebd6225e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11323 bytes