Malicious PDF — malware analysis report

Static analysis result for SHA-256 e401132d91974a68…

MALICIOUS

PDF

54.2 KB Created: 2020-10-18 06:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31ef37238c6a192ca085384911d022a7 SHA-1: 2d2b3353a6981602cad718951089d16fb4264626 SHA-256: e401132d91974a68e78de392006929734bf20bbfbcc95efbbcf02cc656148b38
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://cctraff.ru/strik?keyword=caracteristicas+del+arte+del+renacimiento In PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/mudupoxodowen_fedibav_muxujis.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/131a2807.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/vuxuwanu-giwosofib-begemekofegesu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/pesoxis.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/7953257.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/ecde12c7-81c7-4932-aa94-94c1ece48e4a/69077548220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5640dc53-a41e-4d57-a323-a1cb28807cb1/ladizegigovuweneninupasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b3fb46-cfa3-4721-b202-0d5d9ab6cf30/93852784686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4230b0b-0402-48a6-b3d0-32dfbca6bc1c/53791239112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af26bda-c2cb-4f40-8efa-ec7a2cacd165/glencoe_mcgraw_hill_new_york_geometry_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccef4dee-9ded-439b-b32d-244606ddce1b/27147106249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6802/1668/files/weleraximizolefik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3406/6075/files/sepinonoleridol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2448/5016/files/student_solutions_manual_calculus_early_transcendentals_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/h_p_lovecraft_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1813/6995/files/five_themes_of_geography_questions_and_answers.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_off000093ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93ED 4992 bytes
SHA-256: d1f7b14856f6ca08cc5a10f47f21f859286417b0d9e94774d12ee510f34df1ed
font_01_sfnt_off0000a4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C5 11332 bytes
SHA-256: c442a23d5a654b372283aff44071870a9e287cd118c48b1d7c14c7260f6067a0

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