Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f67e2d07cde8fad…

MALICIOUS

PDF

73.4 KB Created: 2021-02-26 11:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b8080b0dfb30b2e782d5a975dd1b15a4 SHA-1: e23164c1f4c0bbee7a5a4580c72094701bba58aa SHA-256: 4f67e2d07cde8fadfbc6fe1ee8613097569583c6defb6cacf90466ff7548608e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=meaning+of+yellow+roses+in+the+language+of+flowers In PDF document text
    • http://present-mag.ru/sewubifibanefs65km.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/7CGVGjh/line_graph_calculator_for_inequalities.pdfIn PDF document text
    • http://salonhq.xyz/vatuguwegumedazupedo80ofl.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/blijxOv/65918915415.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/is_the_aisin_transmission_good.pdfIn PDF document text
    • http://terem.space/are_the_nike_sfb_field_boots_authorized507vp.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/1964203022.pdfIn PDF document text
    • http://wildber.store/93034279333wchh8.pdfIn PDF document text
    • http://smotrikino.fun/nacidos_para_correrlk2d3.pdfIn PDF document text
    • http://latencfsrt.space/jifuvugalewidn3x6.pdfIn PDF document text
    • http://health-top.ru/the_weepy_voiced_killeruevfl.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/hp_laserjet_p4015_manual_feed_error.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/godoremitiwuja/wowhead_classic_priest_levelling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/79016881762.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/calidad_de_vida_dimensiones.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_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 5228 bytes
SHA-256: 8a3767f04e6813e682f7c38e766344a4059302e69f4fe1f3af32e48c9a901047
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 10804 bytes
SHA-256: d0b14b4a4b7d87f7818b090a1ec966d6f59b23dbdb40235e340cde2ddc48602d