Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade50de3bbc558eb…

MALICIOUS

PDF

12.9 KB
MD5: 74815dd1ae432ffad44112528c6fd6fd SHA-1: 07e3ff934f2b1ef17e103ba20a21cbfb1d7f142a SHA-256: ade50de3bbc558eb5bfaa446752a7f3a1e65908da839228cc22028ac24e9e8be
196 Risk Score

Malware Insights

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

The PDF file contains XFA forms with heap spray exploit code, indicated by critical heuristic firings. This exploit code is designed to execute arbitrary code, likely to download and run a second-stage payload. The embedded file and risky executable script further support the malicious nature of the document. No specific malware family was 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.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
7e4bd462bb635abab7d32a64bf94b3b56572dddd8222e435885020d788c3664b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12497 bytes

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