Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bc38b55080a781…

MALICIOUS

PDF

175.7 KB
MD5: b33c6f2700c0ad7531e483655ed1510e SHA-1: 6404bfa3e4a76294b1a422e9b8cc34e4d7aa796b SHA-256: 68bc38b55080a781cbdfb2d5b0a087c394e74a31010de0cd089b375f1112cdbe
110 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 an ML classifier and contains a critical heuristic for the CVE-2010-0188 exploit targeting Adobe Reader's XFA forms. This exploit likely leads to the execution of embedded shellcode, which is further indicated by the extraction of a suspicious binary file. The benign URLs present are likely decoys or part of the XFA form structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
e3e8e2cfb7614e695705b226701b8797ee0da5c253685eff5cfcc10d9cd7324a		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13454 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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