Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd22d45fee9c5186…

MALICIOUS

PDF

12.0 KB
MD5: cc4097a910f26606ed67869637a15bf5 SHA-1: fbd742f55191d8cde8be957fa057563a1f7632c3 SHA-256: dd22d45fee9c5186fd680e35754f9608f4e4da2523d047152f889d9f5b01fb31
126 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the high ML classifier score strongly indicate malicious intent. The PDF contains embedded script payloads and an embedded file, suggesting it's designed to exploit vulnerabilities and drop further malware. The presence of XFA form elements also aligns with known PDF exploitation techniques.

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
751314c15370b9c29d4b45e44acfc9f95a9e499b14dadfa8f5dbaa7d61b5cabb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11523 bytes