Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b1e2a20d66805f…

MALICIOUS

PDF

11.7 KB
MD5: 22ced17d06c7851d47fbdc9b55668fc0 SHA-1: 38a2558b17902b8b39f77cb8ab1b35702b42b1aa SHA-256: 05b1e2a20d66805fb65c5a6cb545ae192577b7920a73ace7a3424999dd2ede8d
116 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-78. It contains embedded script content and an embedded file, indicating it is designed to exploit vulnerabilities and execute a payload. The presence of XFA forms and embedded scripts suggests a client-side exploit targeting PDF viewers.

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
2622cc66fee1384528bcaee125d4bb236bd95c8327fcde57af7416e80371f6bc
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11180 bytes