Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a888458dca001c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-14 16:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ec20b79c0a6ca22831042cb412ce92c SHA-1: e13a9fca1ba0c817027fa0e79cb7dbc849092028 SHA-256: 85a888458dca001c340979ea8e853d715e4d1c0dc868409f5259e9e72c8973e3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, indicating it is likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically phishing or trojan activity. The embedded URLs and the PDF structure point towards an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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 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.
  • 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://druttle.ru/wix?keyword=gta+3+apk+mod+obb PDF link annotation
    • https://cdn.sqhk.co/rujamuzizogo/4DMjjfs/maplestory_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/igihjby/dream_daddy_joseph_date_2.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/rusesob.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/rhaicUF/85590714013.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/likinij-morutotisuta.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/uKXgeWk/girl_power_cheer_music.pdfIn PDF document text
    • https://cdn.sqhk.co/fanoxozowupe/PlcjikS/best_buy_black_friday_2020_canada.pdfIn PDF document text
    • https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/vodasenibitolil.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/mhdyyKS/survivors_the_quest.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/igerk4l/pimunijizezaze.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/administracion_de_recursos_humanos_idalberto_chiavenato_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/qbhbBhb/51148774025.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/9347536.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/76954896040.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/gdCiecm/space_station_pinball_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwexugebukutim.rf.gd/tapezujuzukadagasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833bc061-41e3-4235-b225-8b11045d710f/how_to_turn_on_mic_in_fortnite_ps4_without_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56adeaa-5c24-4a95-947a-3607694b66fa/nunorozowazidok.pdfIn PDF document text
    • http://givosike.rf.gd/47381577208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a694ea-335c-4b33-8909-d0c9bb9d6554/organic_chemistry_reactions_practice_worksheet.pdfIn PDF document text
    • http://zotebetusapi.rf.gd/charlie_choc_factory_characters.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/splinter_cell_chaos_theory_coop_mission_3.pdfIn PDF document text
    • http://gototura.myartsonline.com/haircut_locations_open_near_me.pdfIn PDF document text
    • http://tiruweditivunaw.myartsonline.com/complete_bhagavad_gita_in_english.pdfIn PDF document text
    • http://bufagefitazi.rf.gd/howl_and_other_poems_summary.pdfIn PDF document text
    • http://naxezutozotos.rf.gd/new_bollywood_music_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09706c00-7c91-4d1c-9c76-5239a3c9a055/troy_bilt_2700_psi_pressure_washer_carburetor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 5196 bytes
SHA-256: 485c09daf90dcfb74999f6bb0b76987a2a3b2ba7d3cdc16d9437128b5b5f1985
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 2628 bytes
SHA-256: a30cb40fa02cf2a0ce4028f36abc23b35ff2f8a27dfb78ed15de8d799b85a339
font_02_sfnt_off00011b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B16 20060 bytes
SHA-256: 9d061741221de5ab403d0fc2559e96eaee07e88d19d23f921ac4e32585a9a162