Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e61460ba618584f…

MALICIOUS

PDF

50.6 KB Created: 2020-11-07 14:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a0b0c7dd2e3b036b75fd7b70537ca39e SHA-1: 2a108730ff2af3a9b66b71bea7b2e082fac83d53 SHA-256: 9e61460ba618584f5b1f10cbc99524ddf5487a151d32775b0132ecb617e75f1d
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://traffking.ru/aws?keyword=the+lorax+movie+questions+worksheet In PDF document text
    • https://kofaxikizija.weebly.com/uploads/1/3/4/3/134336932/17755.pdfIn PDF document text
    • https://wikoriduban.weebly.com/uploads/1/3/4/3/134341401/8209295354cb0e7.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/tawosutosuxi/software_assurance_microsoft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e37668-d1fc-4a37-9c93-2c6cedf07012/msd_school_calendar_2018-19.pdfIn PDF document text
    • https://nuzobelesuli.files.wordpress.com/2020/11/pokemon_master_trainer_instructions.pdfIn PDF document text
    • https://vevadiwo.files.wordpress.com/2020/11/dirulupepax.pdfIn PDF document text
    • https://legokir.files.wordpress.com/2020/11/4613774365.pdfIn PDF document text
    • https://gigevuko.files.wordpress.com/2020/11/ssat_practice_test_middle_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f43cde-947a-4763-8f99-1c5f45f2c4c5/dejusolimejumezifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9004286b-8cb2-4963-a347-8e1e54def3d2/76619650203.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://sinasubun.files.wordpress.com/2020/11/37599847504.pdfIn PDF document text
    • https://virinumit.files.wordpress.com/2020/11/circuito_cargador_de_baterias_12v_automatico.pdfIn PDF document text
    • https://zedokuseb.files.wordpress.com/2020/11/48134847183.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/andrew_kerivan_cambridge_housing_authority.pdfIn PDF document text
    • https://navisemuzezo.files.wordpress.com/2020/11/fiwiluwavorajotekiwukoda.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_off000087b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 5284 bytes
SHA-256: 605f7c7e9ed535b61cd5a0fb2924b77aae453b5aed2eb24e8d14b661c696c251
font_01_sfnt_off0000999b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999B 10512 bytes
SHA-256: cca6706da69a23535369860ebaeb702f7b0d185c007188bb25d4dda3036763a6

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