Malicious PDF — malware analysis report

Static analysis result for SHA-256 71dde2adc9d6ad88…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 15:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3c8ec3ee40a2ecfdb68d580fdaf0b5af SHA-1: 3bf0cd42c51a33dd5b5f7108257d13df7dfe104c SHA-256: 71dde2adc9d6ad885595c6155ae216235fe90a98cd957adb6e9817b63599f033
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=how+to+make+a+robe+from+a+bed+sheet PDF link annotation
    • https://cdn.sqhk.co/kanojasav/hizEVgO/adventure_nightmare_shadow_freddy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_6027c7d531406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5fedd57f32bf7.pdfIn PDF document text
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/1716216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fd0881619fb5.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/f7jfWjh/wapikisikazejif.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/fihgccn/kakulu.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/oIAjcge/17446253707.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/eXhdVgc/logo_t_plus_cross_stitch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fd677cab9cfe.pdfIn PDF document text
    • https://rupedotumimeto.weebly.com/uploads/1/3/1/4/131482941/radudizoj-demumanebajajuf-togukonimofop.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/vizatilozixokobusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_603f7561b5216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5fd09a2b9ef6e.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/radizuveduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_602e870ebaab0.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/78eaba947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cacd9e-a5ab-41cc-92ba-729e440f5bfd/57039325024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9a04cf-7aaf-4284-95ca-fa9ee7dd559d/cules_son_los_tipos_de_razas_humanas.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/data_structures_and_algorithms_quiz_book.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5372 bytes
SHA-256: c40b5d552b878322a84398057f042a77419d522e27f0a04033034d3e42ed33aa
font_01_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 10008 bytes
SHA-256: d749bf24253cdeebc8b05208ed64d83c4e7a0566bcd139809b9acdeb47ffae72

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