Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b2d3dc9c81367a…

MALICIOUS

PDF

79.4 KB
MD5: 050b12a8534dc96bfc924aef6e7e08b5 SHA-1: 4e8d72261fc53e6475f1100b68fd28a47d3e19fa SHA-256: 19b2d3dc9c81367a2579c73ebb5cbaac1039abd3a2088af3c550e649e080c629
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF document is malicious and exploits CVE-2010-0188, a known vulnerability in Adobe Reader's handling of XFA forms. The exploit is designed to execute arbitrary code, which is a common method for delivering secondary payloads. The ML classifier strongly indicates maliciousness, and the embedded file suggests a dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 script payload in PDF stream low 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 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
4e8f792304b35a2254ac5ed179b778255b79f725f2c7456b248b191b817ad37a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80541 bytes