Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af19fe70f1d78d7…

MALICIOUS

PDF

46.4 KB Created: 2020-11-07 23:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 49902f63ff4379ae30a06ce9b077198e SHA-1: 119cbc7c78daafc2e28aad5468f18a97d55e76dd SHA-256: 0af19fe70f1d78d7c587d4600aa8255ebb3a67ecd7d643db121e1a3c6ccfb79d
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://traffset.ru/aws?keyword=2020+citrus+bowl+picks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f894851ad569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5fa0cc6f23446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8b31d640c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f91c4e292194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/389392fb-5a9e-4689-8eed-5d5b3bdf827a/96365877955.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/69401642201.pdfIn PDF document text
    • https://jopafez.files.wordpress.com/2020/11/lenesubumamafutavebujoris.pdfIn PDF document text
    • https://petawasevot.files.wordpress.com/2020/11/vamotobiwi.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://mibejadefoxo.files.wordpress.com/2020/11/tilefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/igf_1_lr3_1mg_dosing.pdfIn PDF document text
    • https://lawetujez.files.wordpress.com/2020/11/32460662224.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://nolapebav.files.wordpress.com/2020/11/21153627781.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 4852 bytes
SHA-256: 13948c93f67b0f32594c517c6ebd11eabc7ad851fcec7d992cbad57b02c8fac8
font_01_sfnt_off00007993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 11144 bytes
SHA-256: 0903bea7aae107955cd24038701cf64687e3f1f0fd0cd6b960c9dca6a964c209
font_02_sfnt_off00009eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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