Malicious PDF — malware analysis report

Static analysis result for SHA-256 850588fc57360d74…

MALICIOUS

PDF

50.8 KB
MD5: f4bcee9bf2366aa6dba2ce68ae85d111 SHA-1: c32de5780125677f892a422c33ddb13549c86afb SHA-256: 850588fc57360d744072ed198637bd8fa2a830c7bac409881e69ed2b1b4f5de6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 PowerShell T1566.001 Phishing: Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA forms to execute a payload. The ClamAV detection 'Pdf.Exploit.Agent-6136306-0' further confirms its malicious nature. The embedded script payload indicates the document is designed to download and execute a second-stage payload.

Heuristics 7

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • 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
7f31991bd51e8b0e87df9129b90c1cfb3c673fe3af341f51874cb76b58e22731		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51235 bytes

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