Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2834e468e2537e3…

MALICIOUS

PDF

40.3 KB Created: 2020-11-08 20:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b259d1773d9d9937628d6595915b7716 SHA-1: 92926def2e05be40b83504a1c3e46e0f40888ad3 SHA-256: a2834e468e2537e34109a511741d23b5acefa613369baa393c76ca1bd4c5fdec
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://trafftec.ru/123?keyword=animal+crossing+new+leaf+emulator PDF link annotation
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/6258518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f9d638430a23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/39664796372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d691fa-25c0-4843-b255-4a59a4f449f1/37913220809.pdfIn PDF document text
    • https://zisaniv.files.wordpress.com/2020/11/38506493434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ed1dfd-671e-4015-b79e-2cfa6b395f79/66856530602.pdfIn PDF document text
    • https://rujimalik.files.wordpress.com/2020/11/xefubageziwurifej.pdfIn PDF document text
    • https://nunuzeru.files.wordpress.com/2020/11/descargar_autodata_gratis.pdfIn PDF document text
    • https://migupuk.files.wordpress.com/2020/11/58621829855.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/4855326262.pdfIn PDF document text
    • https://radusawis.files.wordpress.com/2020/11/towezojiguvujibatuxumotiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47f6888-48a8-49d3-8d65-769554868593/sezafituzezusetiporudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af197fd-c4f6-4ae9-bef6-5a97500be0e7/run_man_2_game_football.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_off00005edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 5280 bytes
SHA-256: f06981e80fd12a9dfa3d92c9787ab369c841f43ed845942ee14e5476a03565a0
font_01_sfnt_off000070c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C6 10744 bytes
SHA-256: fc9f0d6eabc7f40d750315881984b001c37c8599a9defaabeb05cd1430384c72

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