Malicious PDF — malware analysis report

Static analysis result for SHA-256 130b6ac4229522e1…

MALICIOUS

PDF

11.9 KB
MD5: f805cd12cef614df936201eb7bf2f6a9 SHA-1: 7839c88c0af96f46e319cbc465c8a6dbb8d8229b SHA-256: 130b6ac4229522e13fc88a000af96457396ba26ca0dff19b35fce83c41097999
116 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection as Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The PDF contains embedded script content and an embedded file, suggesting it's designed to download and execute a second-stage payload. The benign URLs present are likely unrelated schema references.

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
512ee78eab05a4542fa523d1b3682f0f65baf6d30a30fb82bc4e87366c805e95
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11402 bytes