Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d6eee62d0be73d…

MALICIOUS

PDF

82.6 KB Created: 2021-04-05 18:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2cb270fc946e69317ef20e8b6b761bbe SHA-1: 3287623243f75b002654e073f51465435bb16bdd SHA-256: c9d6eee62d0be73dd003239ef76b08f2cc56024b2c571cbe109be02134c5f97d
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 and a machine learning classifier. It contains an embedded URI pointing to 'https://botokaw.ru/123?utm_term=best+english+language+gcse+revision+guide', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, suggests a lure related to educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=best+english+language+gcse+revision+guide PDF link annotation
    • http://zereteleriw.getenjoyment.net/4673518794.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/umbrella_academy_comic_online_espaol.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/algebra_2_test.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/fagetutep.pdfIn PDF document text
    • http://puwisagoki.22web.org/90444097335.pdfIn PDF document text
    • http://nusezuretoti.scienceontheweb.net/61876148868.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/17906385235.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/kaxukok/pejosogadimejigutemed.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/importance_of_using_alternative_sources_of_energy.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/north_fork_boy_scout_christmas_trees_2020.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/wasumuzowujomoliwizepajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/brighouse_station_platform_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/nijukugibexagupotab.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/46594838508.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/2d_seismic_survey_design.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/bepobi.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/fokimozovemujuku.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/binomial_probability_distribution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/zejoxes.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/formulas_de_area_volumen_y_perimetro_de_las_figuras_geometricas.pdfIn PDF document text
    • http://vumafovixono.rf.gd/ruribol.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/astrologian_guide_ffxiv.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_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 5308 bytes
SHA-256: 99df0a7ebc87d915b55919e350df460d47af010176c08da8a25c2139c89346ea
font_01_sfnt_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 11944 bytes
SHA-256: e996b30b75b8f5e07ab2009c730b6db98102b60d594b10882a8d2d4dab9ba661

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