Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b16db225cb8797…

MALICIOUS

PDF

4.2 KB
MD5: ddede7188653777a06fd8e1f342dc4a5 SHA-1: 28fd5677af3adc8734d6919d1b9097ccdb5bc0aa SHA-256: 65b16db225cb8797aa167956a905c74284a0dd93a3f396023a5fdbb22dc1db55
132 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader's LibTIFF component. This vulnerability allows for arbitrary code execution, which is often used to download and run additional malicious payloads. The ML classifier strongly indicates maliciousness, and the presence of an exploit payload confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/
    • 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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
1697ea387024ac94c914d10871f2cafb4e753caea78e7c18d206380837c08ceb		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x6A 12447 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
embedded_file_obj0010.bin
8af81ed8eb133b8dbc92f16ee731a72b4418c73f308df25baea192d921e616d2		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x979 256 bytes
embedded_file_obj0011.bin
977139995f4a3e80089ef046edd0ffbec2f599f764608f7aca92f29266368139		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0xBD7 887 bytes
embedded_file_obj0012.bin
422a5430698c54d7acba092e1350d18143964b54c5496415f1d8f31cbbcf0663		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0xE0B 332 bytes

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