Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c97c7f48c187a26…

MALICIOUS

PDF

72.5 KB Created: 2021-03-19 20:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231811adcec77e5765a8dfed88b24d18 SHA-1: b350292aec97c6fd3803a5feed04108f84581d9d SHA-256: 3c97c7f48c187a26fbcababf9ab3531b521771b50118fd812143adb9f7500bc1
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to link farms, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=nouve+biotin+bula+pdf
    • https://cdn.sqhk.co/zoburawava/gxmwhef/sominadi.pdf
    • https://mitometivu.weebly.com/uploads/1/3/6/0/136094147/9c6d7c.pdf
    • https://cdn.sqhk.co/kifuzopeko/vijMgfl/throne_kingdom_at_war_wikipedia.pdf
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/8325548.pdf
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/kegofakebozeg.pdf
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/mulozejeselomoru.pdf
    • https://cdn.sqhk.co/nisugavu/6heLjcL/tennis_ball_holder_for_dog_leash.pdf
    • https://tanibabinilez.weebly.com/uploads/1/3/4/0/134018029/2a86b0dfdc03ae.pdf
    • https://womonejod.weebly.com/uploads/1/3/2/6/132681039/zilunoja_buwef_dadikana_vefafadeju.pdf
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/nunujovu_jabuwilizaroso_dobotab_puminoruzofak.pdf
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/e09a1.pdf
    • https://cdn.sqhk.co/tatidukigag/eLhfTij/hitch_ball_sizes_for_boat_trailers.pdf
    • https://kukibujez.weebly.com/uploads/1/3/1/6/131637652/pukusota_bizodusuz_bibud.pdf
    • https://kasadinup.weebly.com/uploads/1/3/4/6/134641165/nagaf-tasolazijide-jajodiwe-polosuwatepo.pdf
    • https://cdn.sqhk.co/ruwopazeg/haHThiu/best_spelling_and_grammar_check_app.pdf
    • https://cdn.sqhk.co/kosaboze/bhgFzhO/go_launcher_prime_remove_ads_apk_full.pdf
    • https://cdn.sqhk.co/kojupiloxifi/igIjihf/multiplex_offline_arcade_games_for_sale.pdf
    • https://cdn.sqhk.co/xipovowimugo/fLjjh1S/lenovo_laptops_price_list.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/27abe1bb-054e-49ee-a72d-93cdb14f0184/90662150511.pdf
    • https://uploads.strikinglycdn.com/files/bd18d7b5-1e77-417a-8313-8787e43ac4f9/historically_marginalized_groups.pdf
    • https://uploads.strikinglycdn.com/files/38881be6-f150-4489-a241-df1129e65c90/mobile_suit_skirmish_unit_stats.pdf
    • https://uploads.strikinglycdn.com/files/3a71e4fa-aedd-475f-a85d-776734d4d758/75857522949.pdf
    • https://uploads.strikinglycdn.com/files/076fa931-266b-43f9-b565-4be96ef7b25d/hp_officejet_4500_desktop.pdf
    • https://s3.amazonaws.com/wiwamoxamo/can_you_program_a_universal_remote_to_a_roku_stick.pdf
    • https://s3.amazonaws.com/datarofapakil/14736020084.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da83.bin
9fdfbd500b63b462833a3783cfa4b44f889256b0bacd591dbefd89c4c429eac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA83 4928 bytes
font_01_sfnt_off0000eb66.bin
a339551ada7c7a60439ca33b113666edc173c832a35fd1210427964c59718ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 13256 bytes

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