Malicious PDF — malware analysis report

Static analysis result for SHA-256 64572f07eee7e88a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 18:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 31cf77e068bc02241657aa93b18d6e76 SHA-1: 21eb3162c2c6ad104a6ed629105c6d53c3b21219 SHA-256: 64572f07eee7e88a6b80618ccfdb6b9fca80c3286a75b9b520cf2d33a763845d
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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=best+app+for+transcendental+meditation PDF link annotation
    • https://cdn.sqhk.co/baxilutifi/SzkC4ri/wunuwejer.pdfIn PDF document text
    • https://cdn.sqhk.co/pejemomet/gONC2ih/44535540233.pdfIn PDF document text
    • http://xxlmature.site/possibility_and_probability_exercises7rdmk.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/fggHdhc/disaster_will_strike_2_level_54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5fe3dec567d88.pdfIn PDF document text
    • http://cosmosqrab.online/word_search_game_learn_englishrkqlr.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/g2xjdja/nepasemanigabuwixupa.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/wygdXSm/lovobaseziw.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/g0gd9if/music_theory_for_dummies_review.pdfIn PDF document text
    • http://kalavar.xyz/lidenilu9g8rp.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/jiBiehM/zuwobujifabone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6013a57e2c50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_60127fab51107.pdfIn PDF document text
    • http://simkosa.website/dividujumavekujurezuviso134xy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_602767a00e375.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/ja9ghgc/kezovofajikarev.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/hIhdvhf/88919876590.pdfIn PDF document text
    • http://laulu-go.ru/tidubeg6j8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fc8ce792c133.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/jUidXjh/predator_pdl_angler_kayak_review.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/fhr6geX/big_w_wings_costume.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/dutimajizowa/city_of_downey_parks_and_recreation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/vopisonobinewonibuk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/comparing_two_excel_worksheets_for_differences.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_off0000e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 5348 bytes
SHA-256: 2bb6c96568bdf79ca5b3e419cba2e5c7a2e17f16b803c5aee2fde5fc614807ca
font_01_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 11880 bytes
SHA-256: b7cf7ae7e6740ba4037267b3e0ac2c37763f5e0dab61cfbcea810d12b588eb0a

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