Malicious PDF — malware analysis report

Static analysis result for SHA-256 0835ba6888d65cf1…

MALICIOUS

PDF

12.2 KB
MD5: f1e5c28d0aae4dbdc6af2002e2f19461 SHA-1: 89ac5c5d789da7d9f258391532084b0b97d3254a SHA-256: 0835ba6888d65cf1610d91ba55fc55dd4273c5d870e331228968bf0023259fe2
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, indicating it contains an exploit. The presence of an embedded file and an embedded script payload suggests the document is designed to execute arbitrary code. The embedded file 'embedded_file_obj0008.bin' is likely the malicious 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 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 script payload in PDF stream low 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 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
6b8fbf976af3b61c0f0de6ea59807fe733f1a00d0f136dd002fb4b3cc4d1b383
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11770 bytes