Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3ab6f51180a37d…

MALICIOUS

PDF

76.5 KB Created: 2021-03-13 21:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9d2be5b1b628d35378e2d46c7aced7c SHA-1: 576dd6257bb067fda52121a7f7f5a3660de5219a SHA-256: bf3ab6f51180a37d611279c6b63f9177db388d1439e9683b78c81ae436a16422
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 0.9991

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://dugedepap.ru/strik?utm_term=what+are+some+good+detox+foods PDF link annotation
    • http://digitalcalakk1.xyz/whatsapp_messenger_for_pc_windows_8._1fy3du.pdfIn PDF document text
    • http://nnorm-id.com/how_do_i_view_live_maps_on_google_earthm3x1i.pdfIn PDF document text
    • http://yoga-fitness.space/the_language_of_composition_reading_writing_rhetoric_second_edition_freexcxyo.pdfIn PDF document text
    • http://fakaripeti.xyz/lasko_oscillating_tower_fan_reviewsdwmcr.pdfIn PDF document text
    • http://copyright-infringement.business/crash_fever_reroll_guide_androidkacib.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/rokuwapesu/jetujoruragi.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/vusapunaw.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/what_is_the_grounded_theory_equivalent_of_case_node.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f260ce-ddf3-4613-a261-9946024bf46f/65076301931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f316bc-3b23-4cb1-94e6-1a5204e59cd0/cinderella_ate_my_daughter_summary.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/poblacion_de_alpacas_en_el_peru_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa84e1ef-90d8-4373-83db-4a7671279ea8/mebetogun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8515e3e-511e-43cc-b048-142afb85cf51/jexojulomejeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1c7d9c-3a5a-441a-9f8d-7c343ecb75b2/how_to_do_the_amapiano_dance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7a45db-d301-4742-aad7-d6317352f203/chocolate_museum_warehouse_sale_2020.pdfIn PDF document text
    • http://jozilaro.atwebpages.com/vilulogax.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/popozonidolasow.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/charlie_parker_alto_sax_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74bad7b-2f61-40fb-a5db-4af98b1bcb00/stihl_hs45_hedge_trimmer_fuel_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d4e900-a690-400c-82bb-02d32e41d507/780963034.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/97467999233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6522a3-a0bd-4853-a479-c513d51f3399/vivamagomovurikeper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b170d9-970c-4dd9-a929-37f4aec2b77b/mofafaloxinugow.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/18405558792.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/airmen_xy_group_online_form.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_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 5368 bytes
SHA-256: a77002344abf63a88d937c08c5a2aed6905d7b6bbbc434a61b272c9c1cb6c653
font_01_sfnt_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 10236 bytes
SHA-256: 8ebed06e2aeff3c305d43dd7bf7414e60d419796992d41392bfd1098df1154da