Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a66cf1be5c26dc8…

MALICIOUS

PDF

12.0 KB
MD5: 7cc6b56304b9f0736fdcfa70f36c073e SHA-1: 1d6e26dee701c741aad30a02f5d048aeced47b7a SHA-256: 4a66cf1be5c26dc8617377e1bf9f847a40e2fe2d8ca34992e277f45f8eeca786
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' strongly indicates a malicious PDF exploit. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF is designed to drop and execute a secondary malicious payload. The document body content is not indicative of user-facing lures and appears to be malformed or obfuscated data.

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
5a3e14975c20f3c3ecadcfe367bd4f57dadc73aba8295bc38b3d23673a88957f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11551 bytes