Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cb1b469adc4165…

MALICIOUS

PDF

77.1 KB Created: 2021-03-08 10:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f25bbdff71441a016e3cdfbddb248661 SHA-1: e937ee403c1a2407a78a4d90880d719359388cdc SHA-256: 00cb1b469adc4165c115f5ef04d97c6ab81312654781eeec5c2ccd2e22068262
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://maypoin.ru/wix?keyword=the+great+gatsby+chapter+5+review+questions+and+answers PDF link annotation
    • http://zesegalos.scienceontheweb.net/what_are_some_examples_of_codes_that_can_be_sent.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/tomavanukokibapitogejuj.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/komemirama.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/a_series_of_unfortunate_events_cast_netflix.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/84033706987.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/166deac0-5ccb-4b78-ab80-c020312c02f5/zuvelovurivevitanivazev.pdfIn PDF document text
    • http://vinixozu.rf.gd/investment_calculator_template_excel.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/lefawozevubugu.pdfIn PDF document text
    • http://bulexaresozo.rf.gd/zobujovugunewo.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/xonumebukupelag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fc21d8-6823-4c30-9842-7437e220fdb8/descargar_gratis_diccionario_larousse_en_espaol_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6944784c-660f-4158-bbf4-916bde042ae9/sistema_endocrino_con_sus_partes_y_funciones.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/acids_bases_and_ph_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d95fe9-4d05-4a32-8290-e8ea1270530a/wizegizofanurulut.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/14869104793.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/baaghi_2_full_movie_video_hd.pdfIn PDF document text
    • http://dovuxomumebajip.epizy.com/linking_words_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb2b2f2-e819-435c-9397-1f9452310189/is_the_movie_run_based_on_a_true_story.pdfIn PDF document text
    • http://pujixedigegogup.epizy.com/which_diet_is_the_best_for_optimal_cellular_health.pdfIn PDF document text
    • http://xesijapapun.rf.gd/data_acquisition_toolbox_simulink.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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 5896 bytes
SHA-256: 8367c14b81b133863228b29b1b6fbd8c552be7f4abd82ac8ac9562ea7773da60
font_01_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 10588 bytes
SHA-256: 9c807d86f2b5a85b7626f502c213a4cda6483be99e3b6a424004737918c2a510

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