Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf7b69bcfffe5ae…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 15:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 235aaf35e802b5c1fe7545e85937acbc SHA-1: 05d987f98facfbfddcf0356d9c82ef4d192a25d7 SHA-256: 4bf7b69bcfffe5aee94fce2095bb7751d48344eee54d44c1fd22bc2abae6812d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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=star+trek+into+darkness+watch+online+eng+sub In PDF document text
    • http://verefdliyvtorogo.xyz/referat_abatere_disciplinara_angajatfdpnc.pdfIn PDF document text
    • https://gusobenatidisa.weebly.com/uploads/1/3/4/4/134475091/kiwakakiwobapemupela.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/zerizu.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/puxadepavaxinipefusa.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/942259.pdfIn PDF document text
    • http://antonioita.fun/what_is_the_best_meal_delivery_dieth3x2j.pdfIn PDF document text
    • https://fenorepaxok.weebly.com/uploads/1/3/1/8/131856491/2b5e4a0542.pdfIn PDF document text
    • http://legendbilisim.com/puxijatabawuwagopikupenarhn6yu.pdfIn PDF document text
    • http://aires.fun/explain_how_to_find_the_total_number_of_compounding_periods_for_an_investmentf2j91.pdfIn PDF document text
    • http://hookup154.fun/the_fall_camus_summaryvlkk4.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/wovitiku/manage_3d_settings_nvidia_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/iready_answers_math.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/2475421688.pdfIn PDF document text
    • http://zejagusip.rf.gd/machine_learning_salary_in_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/gizidosurekirokepixavu.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/69700562555.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/telifilebokinevugukik.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_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 5600 bytes
SHA-256: 9fd65c1126c301af21fd03ccea1737b803daadb119e525e3ca0b1548145fa30f
font_01_sfnt_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 10148 bytes
SHA-256: 9ba7016bc8ea399872eea1f4aea3fb6df69c2f65cd48fa4b935e339683f080b9