Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef25028297c742c…

MALICIOUS

PDF

78.5 KB Created: 2021-02-24 17:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5f84389c09cf855284191379f083cb19 SHA-1: 085892ddace6b71fcef71ae62d2e75383fb1ba10 SHA-256: 5ef25028297c742c89be7a87024bde750d362567320f7be96b7149c8f1512eb9
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://jacksth.ru/award?keyword=best+selling+true+spy+books PDF link annotation
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/5920415.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/second_grade_spelling_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ijZw3H9/ants_canada_shop.pdfIn PDF document text
    • https://rokajovata.weebly.com/uploads/1/3/4/3/134376264/jomawivezimi-lefakosam-kirupasuzajafov.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/27c7e2924ad8faf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5ff3c16e3b123.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/9376778.pdfIn PDF document text
    • https://sizutipaji.weebly.com/uploads/1/3/2/3/132303075/rugekuvezekalin-sekiverilu-lisofamogizexo-vularugudumuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/ghbomOo/weather_forecast_near_me_tonight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_5feff3ec3a040.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/7if5fjh/free_video_call_online_live.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/mexavofezoxi/xapenokekiderujuxibe.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/timovokajuxekerojidijoker.pdfIn PDF document text
    • http://rejosunugewojif.epizy.com/32281957988.pdfIn PDF document text
    • http://zubeleboju.epizy.com/kugupudiru.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/rovoroxawepu.pdfIn PDF document text
    • http://ritarejameja.epizy.com/93311499684.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/symantec_data_loss_prevention_administration_guide_15.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_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 5132 bytes
SHA-256: b2eca163ce06dbfd9ecd3bfdb972d9c254343730d321c1ee9772660a935289b8
font_01_sfnt_off00010971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10971 10440 bytes
SHA-256: 4af6109d330fdfe3f5ddccd945e9d5988f9b8b9c1cbc40420c782beee98c15fb

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