Malicious PDF — malware analysis report

Static analysis result for SHA-256 4031ee7b7f1f7e67…

MALICIOUS

PDF

99.9 KB
MD5: 6b04a02d08d3c1d0a89253b305566d1b SHA-1: 973602177d7b994f3c3159be23e7fa1f8180c8b5 SHA-256: 4031ee7b7f1f7e679af5f8e9fb6c08fddc5b9a4b7913d367854b7bf9b488e614
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

This PDF document exploits the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component via an XFA form. The critical heuristic indicates a direct match for the exploit payload within a decoded XFA stream. The presence of an embedded script payload further suggests that the document is designed to download and execute a secondary payload. The embedded URLs are related to XFA schemas and do not appear to be malicious.

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
603ba0123806d05db53896db2355e674c64e2c10fb428b4cd44742cf7ba24b1d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101513 bytes

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