Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c138b62066606f…

MALICIOUS

PDF

44.5 KB Created: 2020-10-15 22:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c2332f8f055ff944bde798f938a0bd3 SHA-1: 341fcabf67fcf006c3b08004747bd49c7d52b16f SHA-256: c8c138b62066606fecd37e1a06158b91a3d20b8d6ee5a4614823ef8d41242301
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=adjustment+disorder+with+disturbance+of+conduct+pdf In PDF document text
    • https://site-1043569.mozfiles.com/files/1043569/xufalidojuxikijekuno.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/gedoj.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/turexir.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/wugipesobikuv-lokupiz-sarelived-lifoleru.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/bipozitefema.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2bb742.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/2615435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4602496-cca6-41a1-8593-acb5a4a8d43f/63522626351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52f5d2f-8e03-441c-aef1-5a270da802b4/didubelas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b7599e-3003-4249-98cd-49a344005a8d/getovawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0923e146-bdde-4aaa-b83f-b30dd6034ad6/23931011883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4755/8563/files/xuzosamajomixuvujela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5316/9826/files/las_recetas_de_sascha_fitness_descargar_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9670/5697/files/pathfinder_kingmaker_regongar_build_fextralife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/77695702930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3955/3696/files/logesewuros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/can_love_happen_twice_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 5540 bytes
SHA-256: 0381d5cc3f80cd59b530e8779574d79a005c071ec9d88406a9d73ae86892208c
font_01_sfnt_off00007656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 9400 bytes
SHA-256: 41c5efc4b9cc02b22b2b1662f73dacb20bd20fd19040cbb4aa765dbe73849a41
font_02_sfnt_off00009679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9679 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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