Malicious PDF — malware analysis report

Static analysis result for SHA-256 854a7387174e7928…

MALICIOUS

PDF

2.6 KB
MD5: b4ff218564cabe43a2b203477affc728 SHA-1: 183340e7314dc3c1eee6e930779661a127437702 SHA-256: 854a7387174e7928c08ce7357710e3b856b7f3ec731f152b5a7a27a92af9de94
110 Risk Score

Malware Insights

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

The PDF sample contains an embedded XFA form with a critical vulnerability (CVE-2010-0188) targeting Adobe Reader's LibTIFF component. This exploit is designed to achieve arbitrary code execution. The ML classifier strongly indicates maliciousness, and the embedded file suggests a secondary payload delivery mechanism. The presence of benign Adobe and XFA URLs does not detract from the exploit's malicious nature.

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 XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
6cca4def75ea423fdff7451349a488cf3b748e122bd26afb163a98719f12ed88		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x50 13409 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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