Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41b76463b56c90f…

MALICIOUS

PDF

11.7 KB
MD5: 4f9ae09acc40f91c9f7176769a945e90 SHA-1: dc9b01b57a9099fc6724d16799149109f18f4717 SHA-256: b41b76463b56c90fe2a4c983cca433c99e88cbd60b5648dec085b697e22e2072
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's a known exploit dropper. The embedded file and script are likely used to download and execute a second-stage 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
c18c272856606deaf1811f789cc7962316f87f6db6b498c4adb06bbd62115013		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11184 bytes

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