Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2e46e7942ee744…

MALICIOUS

PDF

35.7 KB Created: 2020-06-05 08:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7865ee9f201588d5dfa6200529cae4 SHA-1: 4d37b0dec1bc76207d3077e6e5d76365ef272bbf SHA-256: 6d2e46e7942ee7446300fbec91995a16e7ac8b2ac4b88e5850bcae2d3a7864a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure suggests an attempt to redirect users to a network of potentially malicious PDF documents, possibly for SEO spam or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://quantology.net/uploads/1/3/0/5/130550876/130550876.html#fica+de+retenci%25C3%25B3n+de+la+tabla
    • http://catsincrisisinc.org/uploads/1/3/0/7/130740622/9825070.pdf
    • http://healthywench.com/uploads/1/3/0/7/130739974/807783.pdf
    • http://mariesmeringues.com/uploads/1/3/1/6/131637037/7e4ff45.pdf
    • http://h2hinteriordesign.com/uploads/1/3/0/7/130775063/werabewebeto.pdf
    • http://mta-sts.mail.thevaccinationclinic.com/uploads/1/3/0/5/130590278/70b34.pdf
    • http://staging1.natjacobs.co.uk/uploads/1/3/1/8/131871699/47f40c6.pdf
    • http://redcarpetshoes.live/uploads/1/3/0/6/130603702/c4df5a99c5bf4a.pdf
    • http://forasnou.com/uploads/1/3/0/5/130541221/walibixesa_zotadikejav.pdf
    • http://mj-vvs.se/uploads/1/3/1/1/131164542/4954931.pdf
    • http://quantology.net/uploads/1/3/0/5/130550876/terms.html
    • http://quantology.net/uploads/1/3/0/5/130550876/dmca.html
    • http://quantology.net/uploads/1/3/0/5/130550876/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sarukesap.files.wordpress.com/2020/06/20025417347.pdf
    • https://xovexin.files.wordpress.com/2020/06/92988762946.pdf
    • https://bawedamamoxa.files.wordpress.com/2020/06/pomanigejix.pdf
    • https://bisoliwabogu.files.wordpress.com/2020/06/sewofitadizepumuwipixa.pdf
    • https://jubokukabuba.files.wordpress.com/2020/06/mivefagap.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dcd.bin
5f65e001b76d9074a2be4df10040e508ca96098fb342971d156ff97cb198e8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCD 10796 bytes

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