Malicious PDF — malware analysis report

Static analysis result for SHA-256 22623d59ea10890f…

MALICIOUS

PDF

12.1 KB
MD5: b449085e172c431d9fd190e64808f878 SHA-1: dcdff790218eae3f6642f94b0638e0cf1366a8f2 SHA-256: 22623d59ea10890f5b8f5633d7362e27e04b66516793884f1d3e95c294726cfb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it's a known PDF exploit. The presence of an embedded script payload and an embedded file further supports this. The attack pattern likely involves exploiting a PDF vulnerability to execute a dropped 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
64597cf655bf2d0e940e38bb91d0f4026159cf89b6f97ea3bc5f291623407cbc
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11606 bytes