Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaac055515901f9c…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 10:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9d65e8aa171058516a14e6c8d855ec52 SHA-1: 2615998b2a0e291661fdbdb1cb3142eab851ec5b SHA-256: aaac055515901f9cd11f49300ec999284d5a906d080826a0373275a51ca9c720
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=using+the+discriminant+worksheet PDF link annotation
    • https://cdn.sqhk.co/letijefa/ii2eP5N/87966131221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_5fe79cc0db876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411922/normal_5fe187cf30d3b.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/average_salary_of_apartment_maintenance_supervisor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_60006a0718020.pdfIn PDF document text
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/2602968b592bc6.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/Jghxwjj/71736711829.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/6984196.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/gS0zRic/spacex_crew_dragon_launch_date_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/je1hgih/wodati.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/rawomifixefi-rulavak.pdfIn PDF document text
    • https://xovixonu.weebly.com/uploads/1/3/4/8/134896571/vakijoxijopezefar.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/ggohgif/31930716580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_603140b8bd69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_602b40db01378.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/5bw4hhv/empires_and_allies_free_download.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/kenworth_t800_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/kemuxilajig/jcjdgjN/24774368666.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/95126681267.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/skyrim_alchemy_tips_reddit.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 5468 bytes
SHA-256: 33fa398a2dd47f97fca392be76a5c38f2b80297f8af67353254239b1428720d2
font_01_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 10108 bytes
SHA-256: 9499b59cec764466879a55ce7e3e1c1212f8a43ef3c97d1ef959da81c03b5ba3

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