Malicious PDF — malware analysis report

Static analysis result for SHA-256 0566b4403c9fe0cf…

MALICIOUS

PDF

840.6 KB
MD5: 39fcf9f7a79da13f7e95d1361c06e379 SHA-1: 0a09298bc72421b33eb6aa86a7a6eb3e983d9c11 SHA-256: 0566b4403c9fe0cf549fa8acd7c6b60862905d3ccb756154b9d7bef0ece8fdc7
170 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 multiple heuristics and an ML classifier. It specifically triggers the CVE-2010-0188 exploit, which targets Adobe Reader's handling of XFA forms containing TIFF images. This exploit allows for client-side code execution, typically used to download and run further malicious content. No specific malware family was identified, but the exploit vector suggests a targeted attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • 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.
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • 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
f250dac41c2ad36fa3ff18dd4451c5fcaab265c5b2cf5bc5356a1054bf5f0b1b		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13711 bytes

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