Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ce10c41390d570…

MALICIOUS

PDF

97.5 KB Created: 2021-03-21 07:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 239a3fba032fb50ffc716480ed410cd7 SHA-1: 9e3b94a596da37d296b68dc6509ac7ae8b4a6d31 SHA-256: 09ce10c41390d570531c99731c861ecb773684a87e4532cec1abf0ee8bac0388
126 Risk Score

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 0.9988

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://mezovuduw.ru/strik?utm_term=sennheiser+rs+120+ii-8eu+tv PDF link annotation
    • http://vipimuxatomefi.medianewsonline.com/45227574247.pdfIn PDF document text
    • http://kanijakagiw.iblogger.org/bavobunawasadadudu.pdfIn PDF document text
    • http://nasolanamisajo.iblogger.org/18293898953.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/factoring_polynomials_worksheet_with_answers_algebra_2.pdfIn PDF document text
    • http://poguwukobewale.22web.org/25948856649.pdfIn PDF document text
    • https://cdn.sqhk.co/jawadagive/gjiMyia/74696956268.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/asp_net_mvc_3_tools_update_download.pdfIn PDF document text
    • http://microdigitalmeter.xyz/sentry_safe_master_code_resetoiolv.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzikago/djb3ggo/pubedefobuvizulupozirol.pdfIn PDF document text
    • http://dalefawitibore.22web.org/is_ginger_beer_bad_for_reflux.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/85422687654705i5.pdfIn PDF document text
    • http://lanizimugigil.getenjoyment.net/ritiralovuriwutunufarol.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/kggSjiu/verizon_content_transfer_app_iphone_to_android.pdfIn PDF document text
    • http://ferabugajefelam.mypressonline.com/najube.pdfIn PDF document text
    • http://damvglaz2.xyz/roman_numerals_worksheet_for_class_57jw5q.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/simple_present_tense_wh_questions_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/17799799475.pdfIn PDF document text
    • http://malajusojak.epizy.com/c_tutorial_free_download_for_beginners.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/bimogukerixomanifa.pdfIn PDF document text
    • http://gujusama.rf.gd/89697833884.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/how_to_use_google_maps_app_offline.pdfIn PDF document text
    • http://punotonaduwize.atwebpages.com/92960832500.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/denabuxefo.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_off00014157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14157 5244 bytes
SHA-256: aed32ad2089455b2c8d165fb76570f7a1a568d1580e02bdcada3c62b357456f7
font_01_sfnt_off0001533a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1533A 10848 bytes
SHA-256: efc0288629addc7d67332b6f71c2b34680679fc9bac42571011a3026ae6acd49

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