Malicious PDF — malware analysis report

Static analysis result for SHA-256 083d6d1cbf055487…

MALICIOUS

PDF

79.2 KB Created: 2021-04-23 18:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6aa39d2d6df4117dd52e588eb753c002 SHA-1: 10e4c3188f51891ff47fc5df6124bca2489ceb75 SHA-256: 083d6d1cbf05548710afc0b9e2c06f35ec7ab8205ff93836cefd7d9e71282be3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://lozipotod.ru/strik?utm_term=dish+network+number+of+subscribers PDF link annotation
    • http://youtube-subscribes.com/update_audio_driver_windows_10_dell_laptopa6ama.pdfIn PDF document text
    • http://nakanilo.club/xozorardeoc.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/zovusepajefuzam.pdfIn PDF document text
    • http://drawer.icu/bmw_body_code_chartqhr6p.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/can_you_use_protein_bars_as_meal_replacement.pdfIn PDF document text
    • http://naturalik.fun/dokigumibutemewibb3q3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0ee54c-1eaf-4e7e-b224-41d84c408005/proficy_machine_edition_version_9.5_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/what_are_the_three_types_of_brainstorming.pdfIn PDF document text
    • http://xowuzaxu.onlinewebshop.net/abecedario_para_imprimir_para_colorear.pdfIn PDF document text
    • http://pekowob.onlinewebshop.net/hi_standard_sport_king_serial_number_lookup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c21d63-a3d2-44d7-ac4b-6d0ddc23b47b/26337983563.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/43602578287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377da852-bf11-4999-8df9-06156d03579d/86668723782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f942b1-d612-498c-8a1d-50b49f9d0972/arduino_ide_c_language.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/kosegekagavu.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/2017_toyota_camry_xse_v6_horsepower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6188773-605d-450d-a6a7-7db12dd53cb7/71742086487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f09dcca-d87a-4f75-ade6-50cdf24097f4/5485534992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c643c43-e7f5-402a-853d-de9af70da0ed/how_to_find_my_transmission_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363536cd-eb48-4034-a6a7-234e947b8e3a/john_deere_9500_combine_engine_size.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_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 5172 bytes
SHA-256: 30a98c3260359dfa96dc7c9719c1f8351e41c5770c431f2167d53febe9915608
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 11612 bytes
SHA-256: 89279ae32c8f9ec65ffff17167c37fed5f98b0acbe7aaad0600665e4ced95d93

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