Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7994debc078a057…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 00:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: be52ea8b0eb0b2bf869b14cb0c077a77 SHA-1: 64483927f52220a6a39643d6069b9332720a097a SHA-256: f7994debc078a0578ebcca681bb80d4b6de66330ce20127e6eccc4e6d648f0ef
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=prince+harry+news+latest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f9414e51734e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f90ff21df038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5fa726849c6a3.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/geradi/apprendre_anglais_cours.pdfIn PDF document text
    • https://kalodajis.files.wordpress.com/2020/11/nedojezasisafutebegelixig.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/62243684976.pdfIn PDF document text
    • https://fodabijiwifi.files.wordpress.com/2020/11/distribucion_binomial_negativa_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/insurance_company_accounts_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3842e9bc-efac-43b9-8763-03f14e7c56c3/let_it_go_clarinet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/bikutukora.pdfIn PDF document text
    • https://denuberoram.files.wordpress.com/2020/11/charlie_y_el_gran_ascensor_de_cristal_prueba_con_respuestas.pdfIn PDF document text
    • https://zubonep.files.wordpress.com/2020/11/51759176416.pdfIn PDF document text
    • https://lofapaner.files.wordpress.com/2020/11/bill_of_lading_short_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/pc_849_b.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_off00006a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 5084 bytes
SHA-256: b1be4d7a80eba280a3c96fbfa890d8e4db21bd50c9dcd96fa8c70702e7132ab8
font_01_sfnt_off00007b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 10520 bytes
SHA-256: a2674a01127c6d592e6942c71b1a8b61e3540785846f18d976a84daada7a8e85