Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d19b120cde2d91…

MALICIOUS

PDF

11.7 KB
MD5: 98611eb10518714534f55e2a7dc7489b SHA-1: 1f2e65b1f5d34f4a87c3692bd69d3adbbc5339a5 SHA-256: c8d19b120cde2d918a9711c537bdffd0b6cd379435ff38e99abb06f700daaaa8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. The presence of an embedded script payload and an embedded file suggests the PDF is intended to exploit vulnerabilities and download or execute a secondary payload. The document body content is not human-readable and appears to be malformed or obfuscated data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
aafed3e6e4262bf16f518fe87b2a3082162ac8322d3d9495107fcf122fcb32b7
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11244 bytes