Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bd048607e9cbeb…

MALICIOUS

PDF

12.8 KB
MD5: 4893a91567d677d32246b34cd05dc96b SHA-1: 3fff408f15d35207476661924d579faaaeb3b880 SHA-256: 59bd048607e9cbeb396478fbd8715ee51a99eca2caf48d4da09bc0404e0c81b3
196 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Heuristics indicate a heap spray exploit and executable script within an XFA form, suggesting it's designed to execute arbitrary code upon opening. ClamAV detection further confirms its malicious nature. No specific family could be identified, but the exploit mechanism is clear.

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.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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
7a2f48f957c5b92d5d5962baa666d7bb2a211aca677aa8a2ec837effc4c5d48f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12321 bytes

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