Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bc1cebe2da9d21…

MALICIOUS

PDF

100.0 KB
MD5: ae6d16951ac9f905360341260491d71a SHA-1: 41730fd0c86d108c0e481de1859a204198456701 SHA-256: 20bc1cebe2da9d2106b36a6a43819efa0a1ebfdb0949a575d6fc4815a4ffe045
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

This PDF document exploits the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component via XFA forms. The embedded script payload within the XFA form is designed to trigger this exploit, likely leading to the download and execution of a second-stage payload. The presence of XFA forms and the specific CVE exploit indicate a targeted attack leveraging known PDF vulnerabilities.

Heuristics 6

  • 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.
  • 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
7855c6afc94ed514b0df12e2e9f6f429c61e1e109757bb8b5b5bf5cf261456c6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101649 bytes

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