Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00066f6d349e0e6…

MALICIOUS

PDF

12.0 KB
MD5: 7b36c3af899c8b2f3eca4e46f2758e0b SHA-1: 24bd93c89433c34875a4dff9be2a4200733a576b SHA-256: a00066f6d349e0e636cb90d5d282a7cdd08a88358edfa651efe6064fbd644ab2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The critical heuristic 'PDF_XFA_HEAP_SPRAY' indicates the presence of exploit code designed to trigger this vulnerability. The embedded script payload and ClamAV detection further confirm its malicious nature. The primary attack vector appears to be exploiting XFA vulnerabilities to execute arbitrary code, likely leading to the download and execution of a secondary payload.

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
af505a11f583b5e975053a4ba4f93a03a4535b2fa03051a6d29103085896dda6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11517 bytes

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