Malicious PDF — malware analysis report

Static analysis result for SHA-256 36efc1967b77c74b…

MALICIOUS

PDF

67.2 KB Created: 2021-02-05 02:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 4f6c32a14e3c69780a1fc4bb9d4ac06e SHA-1: e09867313556744af53f74aee44a8751494d0c4a SHA-256: 36efc1967b77c74bb7d865578bc6600ada503676f34311e8d62c137687bd77ef
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://yafferge.ru/shook?utm_term=racing+gears+advance+cheat+codes In PDF document text
    • https://cdn.sqhk.co/govizanorev/jjbAjhz/lighthouse_mall_map_michigan_city.pdfIn PDF document text
    • http://domastmsk.space/nafazimifapuzepipunudm3tul.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jcfUgcA/84498084351.pdfIn PDF document text
    • http://sezituza.66ghz.com/aadhar_card_offline_form_sending_address.pdfIn PDF document text
    • http://jigatinapa.22web.org/bopesapovironesabazojob.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/idBIUmk/artillery_definition_oxford_english_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/gczii9v/jefufitetoninivirinuv.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hxidhcg/ziruwaxitizolewo.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/Eididha/download_goons._io_knight_warriors_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesesasogibigaw.rf.gd/math_addition_worksheets_up_to_20.pdfIn PDF document text
    • http://pudekixepubaz.epizy.com/toy_story_collection_buzz_lightyear_instruction_manual.pdfIn PDF document text
    • http://sajumapudetuji.rf.gd/colorado_state_patrol_accident_report.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/rice_sheet_rolls_recipes.pdfIn PDF document text
    • http://rizibapuzaduxe.epizy.com/99280322289.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/celine_dion_ashes_sheet_music.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_off0000cafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFD 5236 bytes
SHA-256: 1f76623cb38cfa82f82768522818f8d993bb656cc2d8dfe72e628f82077f5a58
font_01_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 10344 bytes
SHA-256: 04ca3983fdd6d46d3fa45457a3f7bfa23369a0286aa72a403c9184d1a3e50a37