Malicious PDF — malware analysis report

Static analysis result for SHA-256 b509c463cf8d59dd…

MALICIOUS

PDF

67.5 KB Created: 2021-02-25 08:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 322468e1fe1207f734da27df6ba9f285 SHA-1: a20c2b167b7c52168bc2dcd252ca4e750ee539ba SHA-256: b509c463cf8d59dd7f93921495fe8851334c0c5804569076016bcd2b1270c139
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=sony+cfd-s50+cd+radio+cassette+player PDF link annotation
    • http://xulubapatoso.scienceontheweb.net/13506186524.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/JgiOjhp/short_film_scripts_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/cjc7r76/380602614.pdfIn PDF document text
    • https://nujobivodiji.weebly.com/uploads/1/3/4/7/134771327/dikigunew_wadedilapulapeb.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/Igj9gj9/sasizividimative.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/how_to_reset_a_amazon_smart_plug.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/reliance_606_water_heater_element_part_number.pdfIn PDF document text
    • https://jizimixu.weebly.com/uploads/1/3/4/0/134095846/1922280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5fcf1aaf4c3da.pdfIn PDF document text
    • http://alexsaf.ru/concepto_de_inteligencia_emocional_y_sus_caracteristicaspcwni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_5fe343fde17ac.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/dchajcF/lininivixerejiwuweke.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/jgf70aK/waves_tune_real_time_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwakitidi.onlinewebshop.net/vibetidukonuxunaxudezu.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/75465508425.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/surapasakevutemobetoxona.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_off0000ca35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA35 5652 bytes
SHA-256: ad83515d196331186278a2c4a42c22441db0d447f433e29811ff7dbc6ecfee25
font_01_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10336 bytes
SHA-256: 36a331d24f449e53fbe76938a014bca992a2f8504a3900f281d5101e752afa2d

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