Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b5d176d60b5fc4…

MALICIOUS

PDF

11.8 KB
MD5: ee7b860d67f7ad5293f1bc1d6a853934 SHA-1: 2e42f7f9b02597658a1ed44e29423a955b9597df SHA-256: 20b5d176d60b5fc499d798307f24172ab082b71818ace579b50a23729b499d8b
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and a machine learning classifier. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it is designed to exploit vulnerabilities and drop further malicious content. The embedded URLs are not directly indicative of malicious activity.

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
bd1215b1b07298f3deb2dd8986f50a19200bd684790948c3f1794de8a182e213
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11325 bytes