Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e265b8f9eb8381d…

MALICIOUS

PDF

43.8 KB Created: 2020-10-06 12:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fecfb31ed2bd31db89308296ca86c2af SHA-1: 11fa4e0fe6d8466b66f0f97a2f5e569154dc96c5 SHA-256: 7e265b8f9eb8381de226f9581a75cf9c7e3cea3aa915c0372569ff997980ce51
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://cctraff.ru/strik?keyword=gprs+tunneling+protocol+pdf In PDF document text
    • http://puriz.greeceadventuretrips.com/uploads/1/3/2/3/132303307/vakugidogirulaxokor.pdfIn PDF document text
    • http://nakulare.brandito.net/uploads/1/3/0/7/130776008/c0512094658.pdfIn PDF document text
    • http://files.vividboutiquehsv.com/uploads/1/3/2/7/132740914/6957915132e52.pdfIn PDF document text
    • http://lobugo.birchbots.com/uploads/1/3/1/4/131414019/fejatil_sosebij_lunonani_semilaziron.pdfIn PDF document text
    • http://files.familyaccessfightingforchildrensrights.org/uploads/1/3/0/9/130968933/batadegetofivem_pozogenerur_regowoz.pdfIn PDF document text
    • http://fovuno.noramacquarrie.com/uploads/1/3/1/3/131398244/f7c940.pdfIn PDF document text
    • http://nisamakav.hinksoncompany.com/uploads/1/3/1/4/131453943/vofirenugoj_mawilune_feramumuruvug_tatumeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/layers_of_the_earth_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0382/0450/files/34576083881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0801/5513/files/soul_of_the_fire_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458b9b15-5dda-4b9f-82e1-84f6938fb5d2/nasev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e78941-2284-4cce-a7e3-12267825f7e6/46884105886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc5dd47-1654-49de-be19-4de1b62a5ae3/vogatilos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d70e03d-b6d2-47d2-b374-3dc3e62f32e2/senevositajo.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_off00006e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E75 5144 bytes
SHA-256: 8ec8bd2c6f182633627a6e75c2b9d4b2d6592f3a5a0ce5a46d1f6bc49de03914
font_01_sfnt_off0000800c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 10148 bytes
SHA-256: e7240b198b6c5bdb69a92e541b7cc494481c9071d8847072920fb038d8a18adc

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