Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f382a0de3a4a7b…

MALICIOUS

PDF

12.0 KB
MD5: 3e5ba9bbc8415ee5045923b93f17edbc SHA-1: 0e7ff3b77188eb87f9341f3cc4b14d94374ead3d SHA-256: f0f382a0de3a4a7b84145f873ca07b7479ee8d4b034ae511e539892b6031d37d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains XFA form elements which are known to be vulnerable to heap spray attacks. The critical heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code is present and triggered by an XFA event. This suggests the file is designed to download and execute a second-stage payload. The ClamAV detection 'Pdf.Exploit.Dropped-78' further supports this assessment.

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
b49c3d89bb6c0d014f4167fac95d94b0dbaab9aaefcecefb7250e956d704fc2a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11529 bytes

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