Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a2781dac9f18c9…

MALICIOUS

PDF

47.2 KB Created: 2020-10-15 12:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0c53e39fcd026fcfc48d361bc80354dc SHA-1: 5ce800bae403724096a5941b6656d070627fcdb1 SHA-256: c6a2781dac9f18c92cc36ebee60efe90147d4a2ae4d030855e8d4e09396771ce
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://gettraff.ru/123?keyword=best+free+music+editor+app+for+android In PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/4843545.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6404364.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/jigekuzileketed.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/bagisegodex-famasunaxuku-bugofotebisig-sisajiriwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f874a5831a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f875a0b29dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87b1444c356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8764a84a3e7.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/f5df2391.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/2681029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f879d6090d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8789b69916a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f878177494e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f877591ee07f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/50267732523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/southwest_high_school_san_diego_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3491/0101/files/que_es_un_cuento_didactico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda20007-f754-4be3-a2ad-5672171dae22/306172901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d1cb5f-adfe-4e0a-a2f2-3471f7fc8dc9/jogugikupal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ea322fe-a1d1-46f1-9c88-cef3d5e0c72a/87392612323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849b5590-f96b-49cf-81ce-21a5029719e6/1536037612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32ba7f1-f115-4832-ad83-9f39a2e3c4de/65851931061.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_off00007a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A85 5320 bytes
SHA-256: a341fa718d59b38452e2673cf95f81ee7f330e44ee0a43923f9d34e24f2e5e09
font_01_sfnt_off00008c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7E 10184 bytes
SHA-256: 37819791b9324eaf174d9f779576282771cf987dfce50516d4cd6a0b4585163e