Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c7f81ea533e10e…

MALICIOUS

PDF

175.7 KB
MD5: 5499ed32580fe95eb6b1b0ffad1b3a9f SHA-1: 791eac3dd32caf18bd9111e0eb489470f8ffb841 SHA-256: 10c7f81ea533e10e4e95e3010ea3d9f30747231c269a4266f63a2a5d8b125173
110 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded XFA form and triggers the CVE-2010-0188 exploit. This exploit is known to deliver a malicious payload, indicated by the critical heuristic firing and the ML classifier's high confidence. An embedded file artifact was also extracted, suggesting it is part of the exploit chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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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