Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c1613ae496fdbd…

MALICIOUS

PDF

12.0 KB
MD5: 992773e25704a5d2acc5b218e8261869 SHA-1: cd5bde125e80473dd1a31f1152ed9a6bb06df59c SHA-256: 33c1613ae496fdbd407f4cbedc25bc3bae533bd639c3bf35a42e57536a3d2dbb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file indicates a clear intent to deliver and execute malicious content. The embedded file 'embedded_file_obj0008.bin' is the primary indicator of the delivered 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 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
69f92f8d75ee6d8569fa03d5a339e068e61889f897618914f5a830f40ebde27e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11499 bytes