Malicious PDF — malware analysis report

Static analysis result for SHA-256 492f9662ca6853a4…

MALICIOUS

PDF

35.7 KB Created: 2020-10-20 02:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7594d17ec22801d1075529091d7913a8 SHA-1: b994884675606545e00cbba1a0942621034cc90b SHA-256: 492f9662ca6853a4e52b9b9f75c84f63904cfa93c61e63fb1cffa4dc07fba105
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://ggtraff.ru/123?keyword=ejercicios+object+pronouns+pdf In PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/mawifivilodi.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/ropoforabejude_buvusulipir_tujubitodave_gulovalubeb.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/ripusup.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/3483085.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/gufifiwet-jilezevemabo-ximaj.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/nazupukoloropuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8731bfce020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f89d9bf0d0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5f8de6969a128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8b99d2c31ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8997f3618e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f888561c52c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f89a0421af9b.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/1/0499/0245/2935/files/summer_worksheets_for_1st_grade_free_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/selenium_cucumber_framework_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3467/2285/files/siguloku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/10_deep_clothing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86095de0-dd9f-4850-8a90-7d9062ec494f/dawiguxogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a9cdd7-c9e5-4451-9573-df019e2db153/bebowuwetaminuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e61d631e-c9ad-4f5e-bdef-42366857ff2f/65625402418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb8be31-6ae0-47c0-9a3b-4494d2fc7452/71063090476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8dd5be-068b-49aa-8e8d-f0990e71ef9d/87453831360.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_off00004f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0B 5080 bytes
SHA-256: 81f326c0e34a0e384ea7ba04579f3f9250b8ba7e6f4fd35a247a7708379ca710
font_01_sfnt_off0000605f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 9648 bytes
SHA-256: 04fcb93ee62256f3f144d5bb5972ccb64577db60e408d8134e1ad5d7117fc196

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