Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fb604649c47568…

MALICIOUS

PDF

12.0 KB
MD5: 60ac45aa9f675c5ee5677bfb32bd7a47 SHA-1: a7f02ee36888f00114b968d04cccbe10d204c5a0 SHA-256: 93fb604649c47568f2a2836516ba701b23c050a16e309f3a8487bde2871a395a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript/VBScript

The PDF file contains critical heuristic firings indicating an XFA heap spray exploit. This exploit likely downloads and executes a second-stage payload, as suggested by the embedded script payload and ClamAV detection. The specific exploit code is embedded within the XFA form's JavaScript, which is designed to trigger the heap spray.

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
939504b23bbe21ef6ac7aa6532e55b92045d7194ddb052b270eb596507ab452d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11529 bytes

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