Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef6bfd3dd7458ad…

MALICIOUS

PDF

76.0 KB Created: 2021-01-19 13:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 670cd5096d2e3e352a91bbca8aa42d7d SHA-1: 68d068bf98455e218c9bd17dd71309686c6e8526 SHA-256: 2ef6bfd3dd7458ad32ce59a03f843bf788ad4addd2fb76ab65b00d2e6a5f9ffd
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of external URIs and the classification as a link farm point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=mykul%20tronn%20club%20kid PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcaa2a0954d2.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/gexadozaj.pdfIn PDF document text
    • https://site-1178232.mozfiles.com/files/1178232/las_nuevas_tecnologias_de_la_informacion.pdfIn PDF document text
    • https://site-1259002.mozfiles.com/files/1259002/chennai_express_tamil_movie_720p_tamilrockers.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/gjharzR/free_equalizer_for_mac_sound_output.pdfIn PDF document text
    • https://site-1174864.mozfiles.com/files/1174864/56884221604.pdfIn PDF document text
    • https://site-1172851.mozfiles.com/files/1172851/duxabokaworujinorika.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebegawiwa/mhcjiqv/99333547095.pdfIn PDF document text
    • https://site-1173855.mozfiles.com/files/1173855/oceanhorn_walkthrough_withered_lands.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/mjfLFW4/tamago_monster_season_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/bheCgjF/54394075158.pdfIn PDF document text
    • https://site-1167925.mozfiles.com/files/1167925/azur_lane_hms_formidable.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/feeding_frenzy_2_big_fish_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5f9efa0c4bc52.pdfIn PDF document text
    • https://site-1177423.mozfiles.com/files/1177423/visiting_card_maker_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ihgjiis/universal_music_artists_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kosuxatune/heahhby/hour_by_hour_weather_for_freeport_florida_today.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/ieFidqv/21601022656.pdfIn PDF document text
    • https://site-1171825.mozfiles.com/files/1171825/biggest_siberian_tiger_weight.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/android_10_for_moto_one_power.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 4856 bytes
SHA-256: 48b1351f53a3645d6b5f6c32e04d00cd61e8f7c7a4f654c2f1f0bd15391d012b
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 10528 bytes
SHA-256: 95a8f03f3a35609a79b8f43c92fbae2d59256c69075a004ff32b2d8d5bf41187

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