Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc3887665998707…

MALICIOUS

PDF

46.1 KB Created: 2020-10-11 00:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 87c74e3dc69b35c359e06547f58e3137 SHA-1: 623acf15cd7e723e7ddda9f48e490555e6ebd128 SHA-256: 7bc38876659987075a2f50c5b5c6526285e77083e1312ec196ff3c6002b2ff80
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/pify?keyword=microsoft+official+academic+course+70+410+pdf In PDF document text
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdfIn PDF document text
    • http://fazepixin.colegiocumbaya.org/uploads/1/3/1/1/131164250/7b1a00452a.pdfIn PDF document text
    • http://nuxitej.landscapegardenersegham.co.uk/uploads/1/3/0/7/130738568/jarub-zikakoluxajapam-jukirifoke.pdfIn PDF document text
    • http://sevukoz.cheekycanvas.com/uploads/1/3/1/4/131437299/924420.pdfIn PDF document text
    • http://files.customcrushfitness.com/uploads/1/3/1/4/131412235/dodeziwaxenolux.pdfIn PDF document text
    • https://site-1038649.mozfiles.com/files/1038649/36893767867.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/lonosetabisawab.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/5386296d-0adb-4e44-984c-4be6a518ef08/2586749153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57978282-5bec-473e-a259-7079c1c12990/29308506418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e69153-a3bf-4506-bd58-9dd23f6c5e44/80227371615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a227b3c3-0b6d-4ad5-91e5-3660449c5217/21117480380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4816/0411/files/kojutegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/cute_gel_pedicures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9350/2373/files/holmes_county_school_district_staff.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_off000073e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 5668 bytes
SHA-256: 97bc0ca258915cf034377682e83da0a9de50b622602ff24fa41fdf2cb8cad9bf
font_01_sfnt_off0000871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 10548 bytes
SHA-256: 6d376b84a40194d381e52c07b346c5e516a575a0969210ee09848f69d754a7cd

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