Malicious PDF — malware analysis report

Static analysis result for SHA-256 79aae8d108f33acf…

MALICIOUS

PDF

99.9 KB
MD5: 4911b90e5f2957aff8f5948690192244 SHA-1: 02ff52b9274a0baac2d84364b028bdc6494afc87 SHA-256: 79aae8d108f33acfc8be45195f3d0f8559b6acbd55aa313885ba80690b11dbad
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by an ML classifier. Static analysis detected the use of XFA forms and an embedded script payload, specifically targeting the CVE-2010-0188 vulnerability in Adobe Reader. This exploit allows for arbitrary code execution, likely to download and run a secondary payload.

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
edbd831cc1475c04d51177ed670573537f5ae67446b5c7f7d081968394a1a77a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101526 bytes