Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e78c82e141673c…

MALICIOUS

PDF

72.0 KB Created: 2021-03-10 07:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d67bdfe09701fd1e18034a3e32b8b424 SHA-1: 8645e20ca75e94b635fdd16c9cbefb01cfd175c8 SHA-256: b3e78c82e141673c22ef57620ffc4a74fa1e25a10b44072b229e6246c4836f50
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://vilenefex.ru/award?keyword=aop+in.+net+practical+aspect+oriented+programming+pdf PDF link annotation
    • http://dkblogin-de.best/how_toyota_production_system_worksz0ojo.pdfIn PDF document text
    • http://kismykeitio.best/xevix9wcgk.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/zakoxom.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/gJggO36/zekufijawasosogegiwak.pdfIn PDF document text
    • http://ekzo-fruit.ru/download_movie_sub_indor3mk5.pdfIn PDF document text
    • https://bijuxoku.weebly.com/uploads/1/3/4/9/134901677/zasedegepofarireru.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/irodov_problems_in_general_physics_solutions.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/8563340.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/YgdAid7/sheltered_instruction_training_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/d4gdbbP/sd_card_reader_for_android_tablet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teropisarazo.myartsonline.com/2016_toyota_corolla_le_eco_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eac661f-2fd0-4820-96da-1e6364fcecaf/rekal.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/how_to_change_the_drive_belt_on_my_husqvarna_riding_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117e6c0e-c79d-4293-a4a9-29954f9fc125/ba_ii_plus_or_ba_ii_plus_professional_for_cfa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45363c44-ec6e-40aa-b94c-c70563cc600f/varobagurarezozur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e61b70-097f-4bd1-86f6-6c2b2599533d/mulemejaxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a6de9b-3ae7-41eb-9d1e-528a3d1da8c7/titikikemuwakudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccb024b-330a-4e08-a2d7-bdd9b7f5351d/the_inquisition_summoner_book_two_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c999d61-89f9-42b1-9bd8-f55152e71c1d/ejercicios_resueltos_de_operaciones_combinadas_con_fracciones_3_eso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94b86b3-a805-4d6b-b270-7b1a93629189/what_is_public_relations_major_in_college.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_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 5496 bytes
SHA-256: 742b46725937a50f48938827ae09b3e196e762ced4d3be2c4632c31fec480001
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 10532 bytes
SHA-256: ea8e86777f08fbbcf61beb7495639fc8b2f44d9820902922c28592330086a67d

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