Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b34283d55f95a7…

MALICIOUS

PDF

86.0 KB
MD5: ea57c1fd2a41014b0822c0a382a2bc8b SHA-1: 112f78bb4a8b2632fc390f07ba8d3b3f1a9fbe0f SHA-256: 00b34283d55f95a7e56db5ad94877b6e3b9f92f5aad16d3c5b69c78a8d658085
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample is a PDF document that leverages the CVE-2010-0188 exploit, targeting Adobe Reader. This exploit is designed to download and execute a secondary payload, indicated by the 'Pdf.Exploit.Dropped-78' ClamAV detection and the ML classifier's high confidence score. No document body text was available for analysis, but the critical heuristic firings strongly suggest a malicious exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
9b02ea5b1b18e360614326660e7688903cd12107dab76a41e27d97c233c2f9a9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 87290 bytes

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