Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f55c2dfb6311f5f…

MALICIOUS

PDF

41.6 KB Created: 2020-11-07 07:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a5718ef80b01ea66467ba6b2af4b00ba SHA-1: d24da5ac61c5eb8caafdd3efa6e73cc03245c85d SHA-256: 5f55c2dfb6311f5fa1fdc5efb603a89185045b422d5dc57a1747de5872892880
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?keyword=pirate+bay+mirror+sites+2018 In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/pavuduxupasukabamod.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/dfcdbdec7b.pdfIn PDF document text
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/43469b131c86b.pdfIn PDF document text
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/xogag-tunebelemagegej.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/7113620.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/7217.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/gesawelireron_waruwirof_jivemil_volebuxiwoxowas.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/28c7ab52-122d-4ef2-9ac5-19154b2f69ea/63174038286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c11808-97ae-4358-ad58-71f6059bfaea/mysterious_shrine_pathfinder_kingmak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee3c55a-fa38-4361-9d6a-c92eb65ac821/guxejuporat.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/auto_fundamentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e28067d-3374-48af-99cb-cae31467d9f8/tokamitenu.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75b1355-ec86-46e2-84b1-2e3522078595/93415044472.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_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5564 bytes
SHA-256: 4c3988839f2766e4ffdebc59c0098cb9167dba9fa26f3870cfe500e4887a5363
font_01_sfnt_off0000767a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 10612 bytes
SHA-256: 6c7108dd5e7c623ed98f90a6d81d05847b933d322d8d981dfea3d609aa54e393

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