Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59742442f76b789…

MALICIOUS

PDF

40.4 KB Created: 2020-10-25 12:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6ded19bf89de304f865081bf369ada4c SHA-1: df52d7c6a96fc554afc46980b0afa67f2f64cfd5 SHA-256: d59742442f76b789af6c0c96bca866c33e3327bba725b02b6cc049e9d82a4f37
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/aws?keyword=nursery+rhymes+ukulele+pdf In PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/sixudibajoxasiw.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/xikux_xotewibexowabo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/wujuzidafek-vofux-buxofavewubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8a13188e113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8bdb8ac2062.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/nazoxomes.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/momed-kujisosejo.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/f1a9c3021c21962.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://tijabitosivu.weebly.com/uploads/1/3/4/3/134396728/6770418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f930be0f233d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f87063f988b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/45052320780.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/max_horkheimer_critical_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/79942008391.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/full_bodybuilding_program.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/business_process_modeling_simulation_and_design_second_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1091/6003/files/zexelalaj.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_off00005efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 5208 bytes
SHA-256: 7d4e922475d4bfc17a1ccd782c76428197f6199a3d1f62bf86fa2e70b8489a26
font_01_sfnt_off0000709c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709C 10648 bytes
SHA-256: 6e4a39e87add7ef032e4e918abf7ebda247f448087630a667b49aece11b1c17c

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