Malicious PDF — malware analysis report

Static analysis result for SHA-256 23cf2bb8152b3e0a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-28 13:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cf0619736ee293b78db087a2e9c01b0d SHA-1: f4452f27645eefa95ef76f5f18822b7d1bbb6067 SHA-256: 23cf2bb8152b3e0a8efb3a82274e5402a69554b912952198391a374e1a53fb2e
186 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
  • 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://kuzutuzo.ru/strik?utm_term=uppababy+vista+rumble+seat+william PDF link annotation
    • http://sakulog.sportsontheweb.net/88741915372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_6030ed6e44b3c.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/2359168695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_5fd19332f05b1.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/lanufigilasenelenut.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/54434517185.pdfIn PDF document text
    • http://net-klientov.ru/laxenubci9u.pdfIn PDF document text
    • https://kopabiziruzoxol.weebly.com/uploads/1/3/1/4/131406592/jilorolomaz_xiditefamaf_dupejatipig_muremodirosore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_60397c2f9cdd3.pdfIn PDF document text
    • http://wownatural.fun/nccn_guidelines_breast_cancer_2018b2x6r.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/epson_perfection_v550_photo_scanner_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6028352d3aa27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_601f676d28906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/ravixozowefokoxoletezera.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/critique_of_everyday_life.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_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 5352 bytes
SHA-256: 6810af332e90b3251d3bcabc192f85d2eee34c8c0c686545f1888b378bb23361
font_01_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 11472 bytes
SHA-256: 62b4b3ef0361d0af9b88edcf1cdaee8c00f91008639e969c4b4ab05e5caa03e4