Malicious PDF — malware analysis report

Static analysis result for SHA-256 9653b0855222dd34…

MALICIOUS

PDF

19.2 KB
MD5: 6e0fa0b29013502f79724ec00240d0da SHA-1: 3dab5b451b80210fd944024d568b7e10c383f404 SHA-256: 9653b0855222dd3490da51cc4917b9bc213fe83b40c48b342956ab747855eac9
96 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-78' strongly indicates this PDF is malicious and designed to exploit vulnerabilities. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF acts as a dropper for a secondary malicious component. The embedded URLs are benign or unknown and do not contribute to the maliciousness.

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
e6ed67277e3b3bd59fffb6cc7b908ab56d04e7dd704efd78696bb9829753f6f6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18855 bytes