Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6da66b874a105c…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 21:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8af10afef37d06ff10b2a7009a2324b SHA-1: 5892ffbd87c1cbb24d167c2c4b53de6bb7990473 SHA-256: 7c6da66b874a105c8ddcf02f0ef632f41ac6eabf4f83907fafdbf39b5775712b
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 0.9993

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://druttle.ru/strik?utm_term=navy+seal+boot+camp+training+for+civilians PDF link annotation
    • http://lugabev.mygamesonline.org/budgie_colours_chart.pdfIn PDF document text
    • http://bizarur.iblogger.org/inter_1st_year_chemistry_book.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/IljbV98/detonazines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_5fd258fc467ad.pdfIn PDF document text
    • http://fufibubesex.iblogger.org/12333780118.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/financial_modelling_excel_course_london.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/social_media_jobs_ottawa.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/cemento_cruz_azul_ficha_tecnica.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/37795059387.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/texoluvefofofesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_60589f7bc06d7.pdfIn PDF document text
    • http://mareson.getenjoyment.net/bikupixazavawex.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/afsnit_6_strkstrmsbekendtgrelsen.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/t4iaGih/my_smart_house_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/fhgYhhF/pexodabesekopifeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_601869c9706a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_6007644bde274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisufovofow.atwebpages.com/61762765689.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/star_sports_live_tv_apk.pdfIn PDF document text
    • http://xidefuj.epizy.com/vocabulary_from_classical_roots_c_answer_key_lesson_1.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/lizomosewozotop.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/miwifogefopima.pdfIn PDF document text
    • http://lufepapuxakexa.epizy.com/how_to_write_problem_statement_in_thesis_example.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_off0000ea09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA09 5608 bytes
SHA-256: 7862f4bcc0c94e0663ae91c7dc792e585f57443f399668e4c8f1245b84e4859a
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 11332 bytes
SHA-256: 91706b3ff881e81262826b06a5cc42f1194e85dc17a3499d1701f6ab3c05e12a

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