Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc85c604f87e0d56…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 10:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fd3af78d7a48aa4a9f7f33f054e190a8 SHA-1: 1b80323023a502f36902aa326e4e1c8cd74aa6cc SHA-256: bc85c604f87e0d5621f8204d6aaed21acb1f8935de039e4a8f7593ea11b2e8c0
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xajibur.ru/wix?keyword=let%2527s+go+play+at+the+adams+pdf+download PDF link annotation
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/kukibiwilejotil.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/Zhggcql/waruzoruxezunejipebol.pdfIn PDF document text
    • http://masexuzijavigap.iblogger.org/computer_certificate_template_psd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_602c6d4c88b44.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/ihghgjs/airline_tycoon_2_mission_3.pdfIn PDF document text
    • https://mefupawex.weebly.com/uploads/1/3/4/3/134317460/61c45f29e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_60383de2a5860.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/jcJ6E3e/37646740851.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/jgJyZie/smart_scan_pro_scanner.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/mitifilekazof.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/25032840404.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/area_of_regular_polygons_worksheet_2_answer_key.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/what_documents_should_be_declared_as_records.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_60258e3c56b17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xosekipile.rf.gd/42637530080.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/dark_souls_3_boss_list_dlc.pdfIn PDF document text
    • http://gufaxepelirub.rf.gd/example_answers_for_job_interview_questions.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/fit_for_life_bay_city_tx.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 5528 bytes
SHA-256: 6cc8d8d06b90ed695f98bc09275c5b2a2957e7cafd3948973ce95a42ba4c7cbe
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10256 bytes
SHA-256: 7fc33a71dc826cb04179e95ed9ed81385fd9cd6d9162d07ad7edf1117c43e404