Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f2958efcfd70b0…

MALICIOUS

PDF

79.9 KB Created: 2021-04-16 21:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 740930534ee1d253aa0b269c71a6b7d7 SHA-1: 26c58adef790f3ab48da3be053fede26e6854911 SHA-256: f0f2958efcfd70b0068f9b6ccc93b445e689d7867b278f7bcacdcc0e6ba47026
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary external links is to 'leonvi.ru', which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://leonvi.ru/strik?utm_term=can+you+strength+train+without+weights PDF link annotation
    • https://cdn.sqhk.co/kukusagufo/hYidf8N/switzerland_vaccine_covid_19.pdfIn PDF document text
    • http://nudabozijojoz.iblogger.org/traffic_report_10_freeway_santa_monica.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/OihjfiG/26554227169.pdfIn PDF document text
    • http://butojaxutaj.22web.org/1284459217.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/hbggsp7/24261840511.pdfIn PDF document text
    • https://cdn.sqhk.co/terexugureto/jcidhfq/english_to_bengali_dictionary_software.pdfIn PDF document text
    • https://cdn.sqhk.co/taguvomir/QiihdaJ/dragon_ball_raging_blast_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/gioB0ge/create_list_in_excel_based_on_cell_value.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/YojhhjL/cars_the_video_game_cheat_codes_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/Aid0igK/strike_master_pro_suit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_14ca6e45152446b29ace7cb60b98796b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f6a0b6-3641-4f59-b502-dc151159ce72/what_are_the_four_types_of_motherboards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f350de7-003a-478c-b419-266a889cef2e/denon_avr-x3200w_manual.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ec41af4e41b946e3b99c16c0b0866cd7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/40937136096.pdfIn PDF document text
    • http://jufusozaf.epizy.com/detabu.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/55585385440.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/template_powerpoint_keren_animasi_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc22526-dd23-4460-b3fc-234276df3dda/how_much_do_crown_replacement_cost.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_de63d16273e64cdc9671e1c31d90ae23.pdf?index=trueIn PDF document text
    • http://furaxem.rf.gd/sbs_2011_remove_exchange.pdfIn PDF document text
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_14bd470a7ce8406bbf8f08753c8bd28b.pdf?index=trueIn PDF document text
    • http://viwefar.rf.gd/dixuxunevevomabakusanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e809a04a-e087-4ec0-85fd-5ecd99fd8d90/40430935573.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/anesthesia_and_analgesia_guide_for_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/digital_photography_classes_chicago.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_0e031b718d1546698933b026c844061c.pdf?index=trueIn 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_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 5016 bytes
SHA-256: e358274be8ab67823993bdc0de208bd0ced9948f572894d3a8136d078aa82199
font_01_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 10828 bytes
SHA-256: 6f56e25fa8b49f48a5350b645f46c58562cfb047b7834a26c65b9beb3a61a58c

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