Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dacc68abefb7b5f…

MALICIOUS

PDF

493.0 KB
MD5: 36631920cd0f560816f279275826e411 SHA-1: af4839d6b3d3a1426f960dc8493b95aca235728b SHA-256: 0dacc68abefb7b5ff918ac6c055688a7512e809739f82cd8522bb936ad821727
112 Risk Score

Malware Insights

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

The sample is a PDF document that triggers the CVE-2010-0188 vulnerability in Adobe Reader, which is a critical finding indicating exploitation for client execution. The presence of XFA forms and embedded files further supports this. The ML classifier strongly flags this PDF as malicious. While no specific family is identified, the exploit suggests a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
033437e923484cbe1694b90c46aeb28868959e96dd15cca7a0961f361f4a20e2		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13434 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
embedded_file_obj0009.bin
c1ca08cdc202469e2c2375888213a43d095f3175fed8012e239d1b90c37f2bb1		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0xB20 847009 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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