Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cce7315ce62963f…

MALICIOUS

PDF

112.6 KB Created: 2021-04-23 07:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d28998c22cda09309520ff4d9e8e29e6 SHA-1: 6cbe792cadc396754197b0fa5a41ed1b34318960 SHA-256: 6cce7315ce62963f107861bdac5913a8bb64a4313159f408efbcdbf57cff8ba2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a link farm on disposable hosting and another flagged by ML classifiers as malicious. ClamAV also detected it as a phishing trojan. The presence of these indicators suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=what+are+different+textures+in+art PDF link annotation
    • https://cdn.sqhk.co/tunaluvum/gggjehi/31379869095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6015d9a58e17d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff38e614fe90.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/goxajonovizonu.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/dUKNjeX/69159381809.pdfIn PDF document text
    • https://cdn.sqhk.co/xupumekejaxa/jjajfQc/93065683313.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/3ZtNqkJ/hearthstone_battlegrounds_rating_distribution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcee1f1c4f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_605f56be43f9a.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/LgcGZhb/missile_over_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/gOS3GRc/7th_std_tamil_book_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifameb.rf.gd/bashir_badr_books_download.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/berger_paints_color_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5b144c-7516-4cc8-8ca5-7c3851e608b4/the_misfit_of_demon_king_academy_manga_chapter_14_release_date.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/wto_analytical_index_2020.pdfIn PDF document text
    • http://xazopufegi.onlinewebshop.net/definition_of_domestic_abuse.pdfIn PDF document text
    • http://pozirumine.epizy.com/alfabeto_en_ingles_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fa192d-4964-4d81-991d-57aac7bf20cd/gazopati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa1e1bba-27c5-4f29-ab20-b0fc1d8e9153/no_matter_the_wreckage_free.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_off00017f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F56 5044 bytes
SHA-256: e845958fb11252817e57f274909106be8f0ba9cbdb9355d866990e16ddcdfba7
font_01_sfnt_off00019086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19086 10548 bytes
SHA-256: c7f9082060d09783607409cbd572a8f542ad8c631ab431f056640bbf0e85bc81

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