Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd2bf24fd47ee0b…

MALICIOUS

PDF

9.7 KB First seen: 2026-05-10
MD5: 8e366da6663f7873c4ba05ca30ed2688 SHA-1: 32b17addc8749921ad2b4518dea42b4c083ec5a4 SHA-256: 6bd2bf24fd47ee0bcb7a1eafd258ac4b47ac4bb50a26d3a7ed581b1ab08b3038
112 Risk Score

Malware Insights

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

The PDF sample contains an XFA form and triggers a critical heuristic for CVE-2010-0188, an integer overflow vulnerability in LibTIFF used by Adobe Reader. This indicates the file is designed to exploit this vulnerability for client execution. An embedded file was also detected, suggesting a downloader or dropper functionality. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader XFA LibTIFF integer overflow — CVE-2010-0188 critical CVE likely CVE_2010_0188
    An XFA image field carries a TIFF whose IFD has a malformed tag that overflows the LibTIFF parser (CVE-2010-0188).
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x55 13442 bytes
SHA-256: b780439383668901430be3a1f146eba78240b240acfbc3ff5ef4a9be81706a56
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x5B4 8610 bytes
SHA-256: a55123521677a9ea85c1dd585532abc9c47d9347eed6f42d29adcd37eccc1536

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