Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c71249b5aee9fc8…

MALICIOUS

PDF

72.0 KB Created: 2021-03-23 13:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 40ff1fe26bb46d2935c647d27969ddf8 SHA-1: 1c24ff0e5737455189120686a7a497c31cf24bc8 SHA-256: 7c71249b5aee9fc824d4324a509827a8fbf9208eefb9e23e6f7469415709b2fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=twilight+eclipse+trailer+parody PDF link annotation
    • http://gonaxepafa.iblogger.org/the_art_of_seo_mastering_search_engine_optimization_download.pdfIn PDF document text
    • http://sreda.city/download_skripsi_akuntansi_perpajakankyhns.pdfIn PDF document text
    • http://wigevopane.iblogger.org/50365213968.pdfIn PDF document text
    • http://copyrighthelpcentral.com/wibolexasonijolawosp2t.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/papenezonezebomubimir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6011357e25fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/LjgPK7C/56368739041.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/jjchdcW/office_boss_s_day.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/starting_out_with_visual_c_4th_edition_chapter_3_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xizojotozodi/bG9Nlhf/niruminogolodufit.pdfIn PDF document text
    • http://cloudplay.xyz/golf_hitting_mat_that_moveskqlhk.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/how_to_drain_kenmore_600_series_washer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5ffc9be7e8b0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visejatuvun.rf.gd/elements_of_genre_in_creative_writing_slideshare.pdfIn PDF document text
    • http://filabos.epizy.com/national_achievement_test_reviewer_for_4th_year.pdfIn PDF document text
    • http://pusevim.epizy.com/suzesiviwagevikegomagiv.pdfIn PDF document text
    • http://wizasagi.rf.gd/equation_of_a_line_worksheet_7th_grade.pdfIn PDF document text
    • http://xavimew.rf.gd/avancemos_spanish_1_textbook_answers.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/teledupes.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_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 5476 bytes
SHA-256: 72272b04b9699a2d774a35d8e59d93aad079d87b43c6703e2a2aa55e3bc0e3fd
font_01_sfnt_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 10780 bytes
SHA-256: c25dddc1d14468549262645bcaacc546db72bbc72b1098fbb04a44b5c1380070

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