Malicious PDF — malware analysis report

Static analysis result for SHA-256 11819b595f5932e1…

MALICIOUS

PDF

11.8 KB
MD5: 2b92576bc942d550e14b48b5a3057225 SHA-1: 5c02aa48f7f6aea97ba22330b1fcdc04531e3a99 SHA-256: 11819b595f5932e1880f85b6641950dcd1036f7648755d2604cff4f0527a0e0b
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating an attempt to exploit vulnerabilities and deliver a secondary payload. The ML classifier also assigned a very high probability of maliciousness.

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 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 script payload in PDF stream low 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 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
88655c60b9e6cdeb530c11c820696e528db0d02f69d5af52bf8cc987d9ed1340
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11341 bytes