Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b4502c7373c835…

MALICIOUS

PDF

68.8 KB Created: 2021-03-09 20:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1af65d2cb0f6074cb56f1cca442e0f85 SHA-1: 2b5d683007a86a0f673a725922ec0941cab581ee SHA-256: f3b4502c7373c835fe58e9e9fcdf39c0d7800be95d0c11f5f4d2568a34376395
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/award?keyword=catia+v5+macro+programming+pdf PDF link annotation
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/boviropekutavaf_wekin_tadamupetexevu_fulesisivo.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/spektrum_dx4c_compatible_receiversk4q6j.pdfIn PDF document text
    • https://tudogevu.weebly.com/uploads/1/3/2/7/132741144/xupokosixomego.pdfIn PDF document text
    • http://baranaydin.org/what_is_a_transition_metal_simple_definitionxfaea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_5fdc46d97c517.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/9648503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457620/normal_6028a7e313a55.pdfIn PDF document text
    • http://fenellalucynelle.info/jipox326l6.pdfIn PDF document text
    • http://natur-green.fun/matipopemuvisefotugulerenfp.pdfIn PDF document text
    • http://glasshookahcatering.com/carl_flesch_scale_systemc8ju6.pdfIn PDF document text
    • http://shtancircul.site/70288251439jhubj.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/nigimul/zoxotuvasuvofak.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_c94a89e8d9c644f6b63181f79ee5f4d2.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_2d896f431b80426ca9d8138b6dc07519.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_3cf46ca79679429eb97efcf43b040552.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujesulad/lijoniwene.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_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 5352 bytes
SHA-256: 92c7c0e25969015f40888e7bb961c3bef60c469fff246517eb7cf554ff52062f
font_01_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 10300 bytes
SHA-256: 94b6a206f49e2e54aac5a305e2219644eb5dc0a82a17985a4eab2e0e39e8febe

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