Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67a0c39b4a24c43…

MALICIOUS

PDF

89.0 KB Created: 2021-05-11 01:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e069bcb6f63f3ffb84d2ccb598e7aa00 SHA-1: 1ec72729bd3fd01b6308d47b1f02cd6edaf29620 SHA-256: d67a0c39b4a24c43a60f0fcab9bbd77a7a8cb42500bcce18219581465960837f
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 0.9961

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://zajinet.ru/strik?utm_term=beats+by+dre+wireless+tour+3+price PDF link annotation
    • https://cdn.sqhk.co/zufuxirap/mjcWLjh/monster_truck_colouring_pictures_to_print.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/MhhXxG4/918217381.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/MjixrhF/kivixotevisaloxukarura.pdfIn PDF document text
    • http://muvubaziforobe.iblogger.org/shawn_mendes_and_camila_cabello_vma_perform.pdfIn PDF document text
    • http://menugefo.iblogger.org/star_trek_voyager_episodes_watch_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/geRCjbJ/baxaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/jbyjhfI/57273531727.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/QtidjiR/3d_highway_moto_rider_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/P9UBVhb/50924396320.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/dhjgfij/xweb_phone_international_calls_free.pdfIn PDF document text
    • http://titonigofitazi.iblogger.org/how_much_is_a_transmission_for_a_saturn_vue.pdfIn PDF document text
    • http://ginutojuluxuvo.iblogger.org/cake_shop_game_free_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/iKgjgfK/sojotixe.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/gqjjieL/action_coin_blockchain_wallet.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/kufazete/64093332163.pdfIn PDF document text
    • http://bajamixowi.epizy.com/53638871767.pdfIn PDF document text
    • http://miwafugupek.epizy.com/pdf_pendidikan_agama_islam_sma_kelas_11.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/juz_amma_dawoodi_bohra.pdfIn PDF document text
    • http://vokanagupak.rf.gd/video_making_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/ccna_routing_and_switching_200-_125.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/serie_a_calendario_novembro.pdfIn PDF document text
    • http://puwagof.rf.gd/delebijixanawanuxo.pdfIn PDF document text
    • http://ratimoli.epizy.com/clasificacion_de_la_tabla_periodica_por_periodos_grupos_y_bloques.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/kenmore_70_series_washer_rinse_cycle_not_working.pdfIn PDF document text
    • http://xixonuw.rf.gd/how_to_study_for_teas_test_reddit.pdfIn PDF document text
    • http://kediditu.rf.gd/lazupuwafosazu.pdfIn PDF document text
    • http://zanelexi.epizy.com/bmw_annual_report_2020.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_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 5612 bytes
SHA-256: 8bfc59458537aea54f8db0727befdfa236e6091bbe4eb3eb5ee430d6cd24e091
font_01_sfnt_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 11928 bytes
SHA-256: 2eeeb787e9b2bc9be8987fe7424f63eddb29aa146f1d720b5ac931e24468a2f2

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