Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b7a35a6e22383c…

MALICIOUS

PDF

46.1 KB Created: 2020-11-09 17:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 35d2f06c4ecfbc34539c3e4c30fdb33c SHA-1: a2b119f2a76fb63336abcf6e4053275aa3c4bb92 SHA-256: a2b7a35a6e22383c0b94de2a1fde1938d321b4a457683291f417386557830bb9
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/123?keyword=importacion+de+autos+usados+mexico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5f972d6e96381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_5f9e3969cdcd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f874aafb8519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f9bd98dc75bd.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/0ae1a11a-d71a-4838-b436-52f233b4584d/mavizerud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b441eb0-5bbd-45fb-a414-6f70baa7985a/36873004810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cbe86e-2514-48a4-9e6d-20668d5db863/chs_home_health_agency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9e6057-d963-48cf-b6e0-f282f993ac7b/list_the_substrate_and_the_subunit_product_of_amylase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a3c2d4-7c1f-4aa5-afd3-06c951a83435/22581395277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78637940-9179-4ce4-95f1-dfd9a24a2028/54053929762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d032a1-8952-40de-ae71-3b5e557d64bf/lopiwunudiledateru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4d20f4-ef06-46e6-bd85-7825a93597b6/kenmore_elite_dishwasher_665_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477f9bed-3e81-4e10-8e04-1ede4b6ab402/lukajuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383192d0-e35b-4256-a8a3-637864c5953e/170973176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525871ea-af9f-4fa0-b6c9-e908e43af445/bus_simulator_indonesia_kerala_bus_skin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d62c26e-63e0-444c-bd32-e24f2289c223/tatetadugekazitazukezepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f824ba-82c4-4cfc-9b6d-3d68a7777c01/dogiselumiwobufume.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_off0000700a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 5192 bytes
SHA-256: 80229b46107e80a25600ee3b92b3d002ed1270110f459779339258986224a218
font_01_sfnt_off00008199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8199 12192 bytes
SHA-256: b7d071c71990006a0c5d60d86430e95b403c339dcdc7d12bfe18cb2645073098

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