Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b754bbd093eb5ae…

MALICIOUS

PDF

370.1 KB
MD5: 7a3bef7842b2e76fe1c1f095c4984062 SHA-1: 69e4c33034b444b53fb5aa6d63ef1e37f39b7bb1 SHA-256: 6b754bbd093eb5aed87577fa0b8640ac1292913deca650f31d8a69bf727ba9b5
168 Risk Score

Malware Insights

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

The PDF file contains critical heuristic firings indicating exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. This exploit is designed to achieve client-side code execution. The ML classifier also strongly flagged this PDF as malicious. Given the exploit, the likely intent is to download and execute a secondary payload, making it a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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
  • 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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