Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bc47f2d0d1e75f…

MALICIOUS

PDF

99.9 KB
MD5: 5275182c4ff4c2dce4f9fedf3109d521 SHA-1: c765035b613e6ad8f010e282fca571d965bc5288 SHA-256: 81bc47f2d0d1e75f2ea29e227d0a43fe6605351687861bb2757855953b757dd1
116 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms and LibTIFF images. This exploit allows for arbitrary code execution on the victim's machine. The PDF also contains embedded script payloads, further indicating malicious intent. The primary attack vector is likely spearphishing, with the PDF attached to an email.

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
09c31e008f5cb5da5f4296c499e6a994806bfd3c86dca27253949126d17e1832		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101557 bytes

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