Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f93e8ed3cd06ab7…

MALICIOUS

PDF

67.0 KB Created: 2021-02-12 09:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b5559208bc9b5d39f265a0f696913ce8 SHA-1: 3f6b4c91bb00afb0205f61c2e4431dd18d387083 SHA-256: 3f93e8ed3cd06ab75f1734fe10db8552ff72611c96f6218237e420bdd9edc36e
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://crophysi.ru/wix?keyword=algebra+1+graphing+exponential+functions+worksheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426675/normal_5fddac427a792.pdfIn PDF document text
    • http://latencfsrt.space/report_writing_on_diya_decoration_competition7wp7x.pdfIn PDF document text
    • http://mylic.ru/busajujatikujemiluw30w.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/a7gdvhg/94517663693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_602610c7dfc7a.pdfIn PDF document text
    • http://best-ital.fun/jackson_kayak_fun_runner_70cgkde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_6010c946db26a.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/eRji5qS/reposteria_definicion_segun_autores.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/w1Zhejj/bekajor.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/cMidhfi/droidcam_obs_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/dihixja/soy_peor_bad_bunny_letra.pdfIn PDF document text
    • http://reliables.ru/21079387143slfy6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fd34075accee.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bOZt7fo/rainbow_ice_cream_cooking_temperature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_601bb2970fd55.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/gedexim/73644573827.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/hyperphosphatemia_treatment_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/79205245510.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/atul_purohit_garba_audio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/the_baytown_outlaws_full_movie.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_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 5684 bytes
SHA-256: 4539dfbc3239f4d9fa412dc4f783d38626e0b3d142617df5feb3f8282be2dde3
font_01_sfnt_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 9896 bytes
SHA-256: 9aa119fc7cd609b1c87084232373212afbfb49dd4cccf04aa2d9677f968dd79c

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