Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7cbf2f5f5e957a1…

MALICIOUS

PDF

79.7 KB Created: 2021-05-06 12:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 338401b43c8145d056b15c799b4fd6fc SHA-1: 79fdf8e4f2daac7198cb4931b0ce7f85ae0356ed SHA-256: d7cbf2f5f5e957a1936f845355458f29d67c61d87d97b01a9ea36b8339f0c162
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, indicating an attempt to redirect users to phishing or malware download sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a deliberate effort to create a network of links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=tailgate+safety+topics+for+construction PDF link annotation
    • http://nokojatagi.mywebcommunity.org/bordereau_de_paiement.pdfIn PDF document text
    • http://erkutungotu.com/vegan_diet_plan_for_beginners_ukfidpa.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdfIn PDF document text
    • http://islandlandscapesbb.com/free_android_file_transfer_app_for_windowszzy2t.pdfIn PDF document text
    • http://onkoprofi.ru/its_kind_of_a_funny_story_book_age_ratingz4ue4.pdfIn PDF document text
    • http://lassituda.online/33504598665jv830.pdfIn PDF document text
    • http://kivekedu.iblogger.org/business_partnership_agreement_template_uk.pdfIn PDF document text
    • http://albatros-trans.ru/10_snf_kimya_esen_yaynlar_indir6tzoa.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/vehicle_wrap_checklist87sk0.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/61902659790.pdfIn PDF document text
    • http://afracheat9.xyz/28266701378vs4l0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b684b943-ed2e-4b62-baa8-9bbd9a55b2ce/motorola_sb5101_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a435bc-7fa6-43e4-9409-fac9f7e25861/mufivirujokatoxewuk.pdfIn PDF document text
    • http://kamegowemegoguw.rf.gd/christmas_carol_lyrics_book.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/travel_salesman_problem.pdfIn PDF document text
    • http://pimiditijusuz.rf.gd/bass_guitar_lessons_for_beginners_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/ariens_rocket_7_tiller_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/sword_art_online_progressive_manga_vol_1.pdfIn PDF document text
    • http://kevusej.epizy.com/how_to_perfect_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2004aa7c-3eec-4ae5-ad83-34c98c8b251e/medidas_sanitarias_covid_19_cdmx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8585dad1-cffb-451c-8492-1447f1c7c8c5/rerawebedadasimapanezer.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/98492771992.pdfIn PDF document text
    • http://gusabonatixuk.rf.gd/bonogozosiledegafozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1fc4cac-7a49-413e-b2fa-e40c2f656d4b/nonprofit_business_plan_samples.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_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 5232 bytes
SHA-256: 48c5be26b035e80566f86ccfa3a0e5c9cc67e555cae205230dc8f336629906b6
font_01_sfnt_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 11016 bytes
SHA-256: 1f6ae2a3c3588975b177548500a1f29ae5eb9b2dc5d427ed9b6346255b394042

Open this report in the interactive analyzer, or submit your own file for analysis.