Malicious PDF — malware analysis report

Static analysis result for SHA-256 300372b6b7bcf9d0…

MALICIOUS

PDF

12.0 KB
MD5: 5e86effdda66195ef15517346d3f63ea SHA-1: e0c3d3247a9001d2969f9023d58121939ff497e6 SHA-256: 300372b6b7bcf9d07d2207c0ed6fcc40161aed24e5ad3ac64830c775999522a3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.007 Abuse Execution: JavaScript

This PDF file contains XFA form elements which are known to be vulnerable to heap spray attacks. The heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code is present within a decoded stream, and PDF_XFA_SCRIPT confirms risky executable script is embedded. This suggests the file is designed to leverage this vulnerability to download and execute a second-stage payload. No specific family could be identified.

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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
e755a23fc55572f2a79febe9136aafc143268dbd3fa0aabd52885fdde6208c7a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11547 bytes

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