Malicious PDF — malware analysis report

Static analysis result for SHA-256 26157237e5d133a1…

MALICIOUS

PDF

50.9 KB Created: 2020-10-15 01:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d7204a207e82d0cfd0a8e36957778fbe SHA-1: b59b4e97a202f6ad76ed129a0acd868057cf4391 SHA-256: 26157237e5d133a19dbed17bd1e5fe46cdd539741fab0501e06d4dc599f62b5b
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=molten+core+guide+punkrat In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/bosos_dawozerulagata_gezopisomugujin_sozijawa.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ef82e0d.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/42599053754.pdfIn PDF document text
    • https://site-1039251.mozfiles.com/files/1039251/10234882643.pdfIn PDF document text
    • https://site-1048559.mozfiles.com/files/1048559/gizutaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87432a619de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f871d3243493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f873bbaf1296.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/3ef84d0b-3244-465a-b6af-1392cfe6cd33/jaziwebekidilasufokawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2c055c-c622-450a-93b1-431694fc9e8a/42550062469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164b3e93-26d9-4692-b0d0-7ec8c9c28b86/wirikub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cfb0617-4e7a-4039-99b4-3aa27640899c/63242905202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c154db-c260-4490-9fb1-526c6e981f43/kuxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fd5b0e-6af0-4a9d-bc8c-c93634c05aba/45940462492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2462/9411/files/danuxolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2721/3719/files/mopimamugifupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/duck_for_president_reading_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0416/8864/files/libimilike.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_off000089bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BD 5132 bytes
SHA-256: 6f89b2dbdf77b6f70ebf1d93b148a33870e4109e8a957ce3edab256f90cd4c14
font_01_sfnt_off00009b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4E 10128 bytes
SHA-256: 7eed8eb2f5eb9a672a35f8f2b7ca9a89b614d7e86be438b3f23f7942a886b3eb

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