Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc6664570d20f3c…

MALICIOUS

PDF

19.3 KB
MD5: 8fe3b6e5a0f41ad2cd593e595b10b9cf SHA-1: c98e4877e51434318dcb7a80d9f446be5888611e SHA-256: 3fc6664570d20f3c90f9a8e49ad1dacec6783a2f7c8ad793f50a7033d5dd1247
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it is a known exploit dropper. The presence of an embedded script payload and an embedded file further supports its malicious nature. The XFA form suggests a potential for exploiting form-related vulnerabilities.

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
3cc08bc96c464ff36ea6b82bce0fb74c60adb159b433171fb23f0afbcb407584
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18972 bytes