Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce21cbfaba5720ff…

MALICIOUS

PDF

19.1 KB
MD5: 5d87f23e12367ab90fe40899c9dce1f4 SHA-1: 1a67fee94f1d025aa36294481941bed4d8f4546d SHA-256: ce21cbfaba5720ffb5ad54e12fbf7d9192dfa18b92df1a714d6ec8d98f567b9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains an embedded script designed to exploit vulnerabilities. While the script content is heavily obfuscated and difficult to parse directly, its presence strongly suggests a malicious intent, likely to download and execute a secondary payload. The embedded file artifact further supports the nature of this exploit. The benign URLs do not detract from the malicious indicators.

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
816347cb7249c94705fd257d6b0ed9a8d0b700c0b60c3e6b48974e873e4d2a06
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18755 bytes