Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3de3a12c2554bfc…

MALICIOUS

PDF

19.1 KB
MD5: 5b31e7c3fc7b9b032883e6f8da825ba9 SHA-1: ac1789aab83e24713d0c387c59ad59bfccc73d48 SHA-256: e3de3a12c2554bfcc4c383942940461ed3f99aa7815e02affed6c74283a04a89
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains an embedded script designed to exploit vulnerabilities. The embedded file artifact further supports the delivery of a malicious payload. The exact nature of the script's execution is unclear due to obfuscation, but it is highly likely 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
e76f2e67d1be226a9991dcd4c80de2cd261cf21b4c965283564bd23b3279a29a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18780 bytes