Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62ba4fb1476673e…

MALICIOUS

PDF

70.6 KB Created: 2021-02-27 14:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 870f5e34f0f969c430577345f7b83b9a SHA-1: 7c76418ec1badf4fe2485f3d5553915655c03856 SHA-256: a62ba4fb1476673e6070187a55c6c3d8b11db7d55589c827e82bb8a61bac2839
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=unit+6+study+guide+biology In PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/8526860.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/43504636075.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/fixebil.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/9133724.pdfIn PDF document text
    • http://jsexj.fun/ubiquiti_airview_spectrum_analyzer28hej.pdfIn PDF document text
    • https://gafirupi.weebly.com/uploads/1/3/1/3/131384721/kigofis.pdfIn PDF document text
    • http://card2card-perevod24.site/gardners_art_through_the_ages_the_western_perspective_14th_editionrsgv1.pdfIn PDF document text
    • http://werenntaq.online/killstar_size_guidejkrg9.pdfIn PDF document text
    • http://itwow.info/18100569526qb7hx.pdfIn PDF document text
    • http://health-top.ru/8839900383811wx.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/duvakogurilafirit.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/horror_movies_2018_in_englisht16rl.pdfIn PDF document text
    • http://handler-autoscout24.com/sign_of_the_beaver_read_aloudz21ph.pdfIn PDF document text
    • http://lidzadva.xyz/maine_guide_snowshoes_reviewuk0u4.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/wevosup.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/vixuwogetiv/wateraid_report_pakistan.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/how_to_find_product_key_acer_laptop.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/how_much_does_a_retired_coast_guard_make.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/wikoliboga.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_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 5072 bytes
SHA-256: 43a13b1ad05a7adab10ca8cc674bb204e2c3c316bd7be2a319ced4d8a8d984bd
font_01_sfnt_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 10084 bytes
SHA-256: 0dd29fb565d56d1a824b0c580cd3d47c733b55de136e1abe7a5757c7455c369d