Malicious PDF — malware analysis report

Static analysis result for SHA-256 849fe36ad301d209…

MALICIOUS

PDF

80.0 KB Created: 2021-02-19 22:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c1dea07ece941e5846b5ae35d4509281 SHA-1: 61120e407b0000fcc339211fcf0fecb58ea2750a SHA-256: 849fe36ad301d209379dc2bf9ca1713dab7003ecbbefddf1276aa5bd240d60b6
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://crophysi.ru/wb?keyword=how%20to%20read%20malazan%20book%20of%20the%20fallen In PDF document text
    • https://cdn.sqhk.co/riketumes/oSDgfIg/kelime_incileri_oyunu_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ythcoic/kuxuropamadidaketep.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/dtSIgjs/camera_magical_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fd0dc53a2cdf.pdfIn PDF document text
    • https://cdn.sqhk.co/gobopovupav/jPihjhV/43465652240.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/jf2khiM/rapunzel_real_life_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6008d4c3d98c5.pdfIn PDF document text
    • https://jizawabule.weebly.com/uploads/1/3/5/9/135966138/378464eb.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/measuring_weight_worksheet_ks2.pdfIn PDF document text
    • https://dozetiwe.weebly.com/uploads/1/3/1/8/131856451/4546320.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/Yyehfhb/litemoripi.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/aAjciep/.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/tenajuw_buzop_lolem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_600cca626bd07.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/nilafafakem/mugopezate.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/57427196851.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/dispositivos_de_almacenamiento_de_datos.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/wallpaper_cute_teddy_bear.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_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 5276 bytes
SHA-256: c2743d23cec30191684baa0b4ed0567988aa0cc5877a6196d3840cf68b2f75aa
font_01_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 10408 bytes
SHA-256: 6b2e0c74a61404970fb2a181b2abe957569e1991625600ed5c0b200a8a141c98