Malicious PDF — malware analysis report

Static analysis result for SHA-256 1183eca08abbf07f…

MALICIOUS

PDF

11.6 KB
MD5: 456b7d32dd9028b04f35936d66ccbf47 SHA-1: 0bb1e7eb6155f57cbc46c4d8fcc47246abfafddf SHA-256: 1183eca08abbf07ff8e285aa86250c37090c954bba6c69797ac80c4054371010
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded script content, flagged by heuristics as a potential payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely through exploitation of a PDF vulnerability. While specific URLs were benign, the embedded file object is a key indicator of a dropped payload.

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
e5c4ec12dd2200acb41d62df87a1bab102dac2c90325f0b208e27593f15d9165
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11148 bytes