Malicious PDF — malware analysis report

Static analysis result for SHA-256 66587d479fda9126…

MALICIOUS

PDF

44.9 KB Created: 2020-10-26 03:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c62f49102b8bac4a2bf4d47ef993e1ce SHA-1: fbd2a8c83003b8d89c21aa10babaa0a599765339 SHA-256: 66587d479fda912672a07c181beebb74273ac36ba725fe9834404eddf0d69690
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/pify?keyword=phantasy+star+online+gamecube+mag+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f8bce86f100b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f93e200582e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875fa39307d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f94a8aa4c253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5f8f3b42a9327.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e4a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e4a.bin)
    • https://s3.amazonaws.com/nezanurugega/6853335230.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/belajar_adobe_premiere_pro_cc_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/22437085810.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/determination_of_calorific_value_of_fuel.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/ecologie_et_biodiversit.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/panafoku.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/84706372697.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/sociologie_des_organisations_crozier.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fuxeferuzasomuguduwe.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/fidibisopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7759/1744/files/tugepunideko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4246/9526/files/98784978455.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/exercices_verbes_avoir_et_etre_au_present.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nigakabozudo.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/finding_angles_of_a_triangle.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/phonics_activities_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/autocad_2018_print_to_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/aceites_esenciales_young_living.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/different_types_of_teaching_approaches.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/icao_annex_7_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/riesgos_biologicos_laborales.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/auxiliary_verbs_esl.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 extracted file (font_00_sfnt_off00006e4a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 5596 bytes
SHA-256: 136d6a880ddf509d54ffcdd4ab3f67ab9a6a0b36167b9f9f29c1f89d72092679
font_01_sfnt_off0000811e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 10892 bytes
SHA-256: 287ea6cac700208af387373640d2cdceba32598dab0cf4cc1447de7506bbf6b4