Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae473a8f0e3ee87…

MALICIOUS

PDF

68.0 KB Created: 2020-06-12 01:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaadae242d00e335cef37db987ed21de SHA-1: 167c49f92b761b0a83470953b2392533ba715d2b SHA-256: 8ae473a8f0e3ee8712014c6353b6bb799c7896c67d33e0f318c061f4c0d6ad6f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains. This pattern is indicative of a link farm designed to generate traffic or potentially serve as a landing page for further malicious activity. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://autodiscover.yellowbrickroadcoaching.com/uploads/1/3/0/8/130874416/130874416.html#dell+latitude+2110+user+manual
    • http://k-mercado.com/uploads/1/3/0/9/130969389/5151872.pdf
    • http://calligraphy-corner.com/uploads/1/3/0/4/130436519/dikuzexo-tewadetuwilet-sexazafixotipi-rifif.pdf
    • http://heartlandgetaways.net/uploads/1/3/1/1/131164113/taxevavubovotepe.pdf
    • http://consciousrealignment.com/uploads/1/3/0/4/130477036/vexuja.pdf
    • http://lupifinancial.com/uploads/1/3/0/6/130604703/d3eeeaf967.pdf
    • http://topduiattorneyaz.com/uploads/1/3/0/2/130272853/649778.pdf
    • http://mx.smuddlaw.com/uploads/1/3/1/4/131455722/lefil.pdf
    • https://puwubovefije.files.wordpress.com/2020/06/92273292033.pdf
    • https://gugotuka.files.wordpress.com/2020/06/27469716248.pdf
    • https://wadikow.files.wordpress.com/2020/06/fisaxurekuguti.pdf
    • https://sadobibelor.files.wordpress.com/2020/06/75130912916.pdf
    • https://pafinomoj.files.wordpress.com/2020/06/muzunojubedewulopetisinu.pdf
    • https://pumodazu.files.wordpress.com/2020/06/javubewarikubede.pdf
    • https://suwaboto.files.wordpress.com/2020/06/93424290039.pdf
    • https://jerurig.files.wordpress.com/2020/06/64002887374.pdf
    • https://zuzadusete.files.wordpress.com/2020/06/luwimemujaroli.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://pumodazu.files.wordpress.com/2020/06/javubewarikube

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007124.bin
3bccf89481955aadddd6b71b9181caa65896db73e3fe8aa278025152d9ca3633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7124 17732 bytes
font_01_sfnt_off0000aa9a.bin
efd9ee6e0d2333374fc2a8bca67cce5db5870ddd0a83669ffc683eaec912d52a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9A 20680 bytes
font_02_sfnt_off0000e512.bin
f3e59a59810c6509f34dd7dba895bb7162d82f66b38b6489ba93e0e698c4a03e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 18360 bytes

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