Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6278e36eefcbde9…

MALICIOUS

PDF

79.7 KB Created: 2021-03-08 07:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cefa82fac35bfd32b4e107865e2187be SHA-1: 26a65228d8f12ecc0f5f56a3278705fb53cc2e81 SHA-256: d6278e36eefcbde9bf7b159f82f280586c5df2bd55c132395dc2114a94522bea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to book downloads, and numerous external URLs are embedded, many of which are hosted on disposable domains. These URLs likely serve as lures for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=marques+de+sade+libros+descargar+gratis PDF link annotation
    • http://pop-marketplace.ru/11786765205am000.pdfIn PDF document text
    • http://triple-doska5.club/the_snake_vs_block_addictive_gamesmjb6x.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/rGjfjcR/zomikunorabozima.pdfIn PDF document text
    • http://istra-backwater.ru/552010804843wtod.pdfIn PDF document text
    • http://good-production18.site/61310091272llcjo.pdfIn PDF document text
    • http://immortal-sho.club/overwatch_aimbot_ps44fy6v.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/toxugaxixusisobixudixok.pdfIn PDF document text
    • http://salopkisa.website/53716211154jfq0l.pdfIn PDF document text
    • http://bonboxstudio.com/64992603628hhgm0.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/xobudozegodepupikeduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6019bca0b4ced.pdfIn PDF document text
    • http://rafale.store/mobile_number_recharge_offersmkg0d.pdfIn PDF document text
    • http://gufutaca5.xyz/levutitizogjwsnk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_60344b37ed66c.pdfIn PDF document text
    • https://cdn.sqhk.co/fifibaje/eF19gcB/math_worksheets_simple_addition_with_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/12b580c8-b8e4-4b1f-9076-d20464ac3c71/caracteristicas_principales_del_modo_de_produccion_de_la_comunidad_primitiva_esclavista.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1988b5dd-068b-4240-85ae-807965a7b314/jipunud.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/7787641097.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/lakoduze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 5152 bytes
SHA-256: 1b75f36caf13c161fc4bbcb012908e1336ab9d740d0f473f73fc2492bad526f3
font_01_sfnt_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 11212 bytes
SHA-256: 342b63a02639040ef83113a1122e2bc70f36121ad1fa639f7748aac27f827cc9
font_02_sfnt_off000121d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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