Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeaad4e20b0d563…

MALICIOUS

PDF

49.0 KB Created: 2020-10-20 02:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 71e3ebe7d7a17f23bf47973cabb6ae15 SHA-1: 2d0201bc0e5448acc59c1dc599d0b2e6ace9303d SHA-256: bdeaad4e20b0d5630d04d6252ebcbbf8c29c16577da03e79359b28776d69c6a2
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/123?keyword=set+custom+adapter+in+spinner+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f892486386c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8cc33286b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f88993abe6f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8835423fe4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87423de98de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8e173369689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8b5384ad561.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/wutudopafilonev.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/gezemik.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/5652282.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/zafegebozesekot-xanuvinedepa-luzinogiwe.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/356b2d76-4a9a-4569-82b6-c3580c7d5a59/xopijibakulisatogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca06d49-ba6d-434c-a066-f1466af0b662/70383071799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47459ea-3ee4-4999-813d-304cb8344237/jevuvogizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab9b7a9-197f-4397-92bf-3869da13f24d/88679248477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67cb9520-5016-42d4-b0f3-02816340fc91/bixenukopebawejasepola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f5375e-64fc-4de2-9bbf-85a703d2774b/88569770494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ba532c-5cf9-4778-8bbb-ef2ac2ed3db6/comentario_mapa_unidades_morfoestructurales_de_espaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e02bdb7-553a-4f4d-ba68-8e519e405d09/pisuzevideselem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d83790e-03a3-400a-9afd-ffdbb6883407/76359968354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93940a07-3309-4194-97a0-37b72a75defa/42624034028.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_off00007502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 5288 bytes
SHA-256: b128fcd8b0b49d5e4e033f5a6e29944d31d12c5c36f642188979fffa221a7c81
font_01_sfnt_off000086df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 15452 bytes
SHA-256: d71b0489ffad5fb0045d41bcfaf1ef058b374b61d0a888d08233366c36b91072