Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f0017d3a9819e8…

MALICIOUS

PDF

12.1 KB
MD5: 45b090fc975cc681970034a0395964d5 SHA-1: 0eee67afdaebebfc6ccb4009f6026e46820f0d08 SHA-256: d2f0017d3a9819e8669812f3e61c1a499e6fcfde429349ad217f771808df3639
196 Risk Score

Malware Insights

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

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 the presence of exploit code designed to trigger this vulnerability. The embedded script payload and the ClamAV detection further confirm its malicious nature. The primary attack vector appears to be leveraging XFA JavaScript 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
49b6925b3a8ce3fad8a02beeda179db9037d4fd0977878428c82c384613fdae7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11589 bytes

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