Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fb6549fc5ca61e…

MALICIOUS

PDF

37.4 KB Created: 2020-10-05 10:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e24882f1cd7bfa201e45dbcaa67afeff SHA-1: 2c031efe312ce8334c5b051dc8b60bf6bcdc1420 SHA-256: 19fb6549fc5ca61efd6708f136bf64863153f22d90d2a2b1156ebd46c6e78b8c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=chicago+that+toddlin+town+sheet+music+pdf In PDF document text
    • http://files.innovative-teacher-motivated-student-project.com/uploads/1/3/0/8/130815095/5486015.pdfIn PDF document text
    • http://files.yogabydaniellesmith.com/uploads/1/3/2/3/132303028/kamazewevenala.pdfIn PDF document text
    • http://guzobek.figmentsandglimpses.com/uploads/1/3/0/8/130813799/didazex_fizasebiladotu_tizafetox.pdfIn PDF document text
    • http://files.docsleasingservice.com/uploads/1/3/1/3/131379824/9783022.pdfIn PDF document text
    • http://files.kidfoodiecolumbus.com/uploads/1/3/1/4/131483955/4702564.pdfIn PDF document text
    • http://files.breathingblues.org/uploads/1/3/1/6/131637073/eb4d0e2774.pdfIn PDF document text
    • http://files.katherinegaulke.com/uploads/1/3/2/7/132711936/mewaja.pdfIn PDF document text
    • http://jobexisak.cwowi.eu/uploads/1/3/1/3/131383761/7460641.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/0c5ba854-6ee9-4f6a-acdd-a654d1726ae8/20801033966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fc1631-94e6-4df5-af9b-2ba03d4bff26/vajipigigirinudekuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c7995e-2b04-421b-9a25-750eada07ada/patogokusolax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/1985_john_deere_318_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6870/5954/files/93610122428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/metrolink_la_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9549/6606/files/saiga_12_gauge_30rd_drum_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/unblocked_games_77_super_mario_crossover.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_off0000544d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x544D 5472 bytes
SHA-256: ed58818ad11af6f11a45e474a893b317cbc6c8f18840f0b565d6bf71b97a5121
font_01_sfnt_off000066d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 9824 bytes
SHA-256: 85bfcaede2b6994018570d5ba796bce5aabab74f45c88ac3949e1edf2e3d56eb

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