Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9298e53a39fca46…

MALICIOUS

PDF

46.5 KB Created: 2020-10-01 20:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: deeb641a09e15bef7fc918a135b379bf SHA-1: 760869597d6d6c267a5c187576ca56787a9ff553 SHA-256: b9298e53a39fca46a30b0937a14a740f49055768261ab7c7deff49b601220e90
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/strik?keyword=comparison+of+adjectives+worksheets+with+answers+pdf In PDF document text
    • http://files.nlcoopertyres.co.nz/uploads/1/3/1/8/131856887/3183203.pdfIn PDF document text
    • http://files.simplyshoppingat808.com/uploads/1/3/1/3/131384145/a2eff.pdfIn PDF document text
    • http://winibo.angelinadauguste.com/uploads/1/3/2/6/132681229/14744ac73647b.pdfIn PDF document text
    • http://files.statisticalsolutionsllc.com/uploads/1/3/2/7/132740778/bf1879b02f.pdfIn PDF document text
    • http://files.plevnacougars.com/uploads/1/3/0/8/130814349/f28e97594e.pdfIn PDF document text
    • http://files.petitenadirah.com/uploads/1/3/1/3/131398292/f894c29.pdfIn PDF document text
    • http://files.royaltyprint.net/uploads/1/3/1/3/131379956/gufifinovevatidugel.pdfIn PDF document text
    • http://kanobaw.daviddriffilldesign.com/uploads/1/3/0/7/130775203/tenaperobebobun.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/be7bfec5-c0c1-498e-ba73-adf82e52f111/ruzuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf92e4e4-7f9d-4282-bcae-0523f641e750/33594961514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44274af6-52c2-4e35-bf36-df99ed224895/tawunuwaniteguweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8711b84d-b949-40bb-8b21-6280fb7a7e18/79814360414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80c083f-dd28-4b46-8aa9-7995e3029a8d/59620964930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5f9def-26cd-433a-8559-f6a9b3bfd00c/rigawurawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0537b9f8-f556-48f1-a94b-72302180fc1c/26023728258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3454a78b-7792-446c-a7db-4703ab2ebcf5/jalimobomusutax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145419db-a400-4bae-b827-581e8926e314/zojenesaseramebig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41a7d83-ded6-44a3-82b5-35c126face8c/sanotonu.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_off00007682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7682 5560 bytes
SHA-256: eda6f76bd197a5edf70cd25bf8af3a160080508de6b80b343ce18b14a35422db
font_01_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10404 bytes
SHA-256: 92540db24f479281c8be4179a6fe4d702e3db13741a0d615c991c4a43574ae04

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