Malicious PDF — malware analysis report

Static analysis result for SHA-256 814c10ced2b6b4fa…

MALICIOUS

PDF

42.6 KB Created: 2020-11-09 03:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 18d35f446480d614495415fabdcfb568 SHA-1: 86de60b2b33cbe9c1ae8b34bb111d3e66783ae20 SHA-256: 814c10ced2b6b4fad98bdf4d3d1871925f8a2b742778d7023d1cf47505612553
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://traffset.ru/123?keyword=create+a+google+plus+page PDF link annotation
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/25d9ac17.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/0a9966dc0ea.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/2316966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5f96a647db302.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/xaxarizesu.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4e38bf0.pdfIn PDF document text
    • https://sudusomot.weebly.com/uploads/1/3/4/2/134265470/pixeg-devubitorirogav-jamobozebope-wopupoxudoj.pdfIn PDF document text
    • https://tejubodefi.weebly.com/uploads/1/3/4/3/134351051/mudizemuxavabis-gomuxunurake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://selogum.files.wordpress.com/2020/11/vitabibuvokane.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/nitrogen_v_oxide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 4892 bytes
SHA-256: 50233f7d127db574fb404aaebfc78dd7e2847812ee3edf6fa2d80a9c3ea2c9c3
font_01_sfnt_off00007986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 10520 bytes
SHA-256: aacceaedfca826f9c83b5f5ec00b093e38a48c481ce8c823916152fa0b55346f