Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6b91e5604c24e9…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 17:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ecec51f774635e4bd7fca0b3527e04b SHA-1: df1933b73d06f824b30ef69b37310dfb38f5597d SHA-256: 6d6b91e5604c24e9ae5755153735650efa6b7498bc2f918a70c2c791b8a697c4
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 0.9967

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://gimoguvi.ru/123?utm_term=anime+super+power+terbaik PDF link annotation
    • http://zdsshop.top/33162868898sa6i0.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/gOko4pO/28553665332.pdfIn PDF document text
    • http://meetsalon.xyz/kepisuvotuwizakulebexe5ioql.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/haktXjb/find_friends_phone_number_on_facebook.pdfIn PDF document text
    • http://bigpleasure.ru/how_to_write_a_health_and_wellness_plangozav.pdfIn PDF document text
    • http://remont-pc.website/niguwamiwuserezo2wsdw.pdfIn PDF document text
    • http://reduslimitalia.site/60232709471chdlc.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/iedmp6w/rollercoaster_mania_mod_apk_unlimited.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/little_red_riding_hood_song_sam_the_sham_and_the_pharaohsol04c.pdfIn PDF document text
    • http://comforfemj.fun/my_life_and_work_henry_ford_summaryrfuuk.pdfIn PDF document text
    • http://coolvdomaion.online/minuet_in_g_beethoven_cellof8wqt.pdfIn PDF document text
    • http://devlp.club/1998_club_car_golf_cart_service_manual_downloadkkhur.pdfIn PDF document text
    • http://steel-lipetsk.ru/susukop6y88h.pdfIn PDF document text
    • http://nutristrike-shop.ru/how_the_grinch_stole_christmas_1966_watch_for_freeceo2r.pdfIn PDF document text
    • http://ampinternational.org/divozarokevecr8e2.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/Hihhfhb/58158390680.pdfIn PDF document text
    • http://trendmobile.ru/b._ed_ignou_online_form_2018ax78g.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/27690978606.pdfIn PDF document text
    • http://50offstore.pro/dipompyt70.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/is_in_the_heights_on_broadway.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/remavuj/81490279948.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/aiag_vda_full_form.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/tutalugapamijalo.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/how_to_use_baby_bjorn_mesh_carrier.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/bosajikesi.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/kodaforojamavamivufapejos.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_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 5220 bytes
SHA-256: e77dc2adffe26ea3832b2570ff6d56fb903a76645a8a80cc6252ab3bc1bc4b8b
font_01_sfnt_off00011414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11414 10784 bytes
SHA-256: d2b2d38c692d2f0a41e92e0c9c193a80aeb21d96b7a0d6005ef704d520ec2c13

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