Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc97093c796a1f1…

MALICIOUS

PDF

43.9 KB Created: 2020-11-08 14:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 95e2fa05708a69718959b0a3fed374a2 SHA-1: 6a51f6d5ed57b6c9155c96600a339b8f81a5ebf5 SHA-256: 8bc97093c796a1f1f1115ed655081c3f9984d78fdfb8e0bb656e1259759ef100
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=educational+minecraft+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f9db0fc21001.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/vomod_voniv.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/tuzamada/subtraction_borrowing_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1edc7f-4d55-455d-92fe-e78905ea9214/auto_call_recorder_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec4ef8d-77b8-46f8-961b-9e2010bb25af/viwotenatatu.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://turasugi.files.wordpress.com/2020/11/18514894094.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://rujimalik.files.wordpress.com/2020/11/duwikadefuditebovaganig.pdfIn PDF document text
    • https://nodumizid.files.wordpress.com/2020/11/o_cessate_di_piagarmi.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/xexupixurefiwosonubazima.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_off00006bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 5144 bytes
SHA-256: f21f91ad51eb1bd3d8e85ecb5582f4c945e9d057b5e131aa7dcb8c603daaaca4
font_01_sfnt_off00007d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 11072 bytes
SHA-256: 0bc20adac270546ecbc594a2303c2e2e88c59b78834cd706508e7cc29b84f18e

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