Malicious PDF — malware analysis report

Static analysis result for SHA-256 0457f06703f1d847…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 18:38:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d78f30aee319b96b36421302fdadfe20 SHA-1: e6dd69b18e255cc6677db7fe99beadbb7ce17c97 SHA-256: 0457f06703f1d8470467f1f67fd265583c07e0a5e7e5ca1507b88db2019a9f70
186 Risk Score

Malware Insights

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

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 0.9994

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://lozipotod.ru/wix?keyword=runkles+york+pa+hours PDF link annotation
    • http://vitofemegawe.getenjoyment.net/sukaxosagoli.pdfIn PDF document text
    • http://retamos.mygamesonline.org/tebuwapolexajuviradijusej.pdfIn PDF document text
    • https://kijenelix.weebly.com/uploads/1/3/4/6/134612576/vibekijizukew_maluwinijuzutuk_juxerole.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/4885726.pdfIn PDF document text
    • https://zabojipenow.weebly.com/uploads/1/3/1/6/131636987/remafojibulabaw.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/befugari.pdfIn PDF document text
    • https://pezasagizagifoj.weebly.com/uploads/1/3/5/9/135968908/377cd83e8b8.pdfIn PDF document text
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/8471156.pdfIn PDF document text
    • https://rawuwivusezorom.weebly.com/uploads/1/3/1/4/131406564/rovuv.pdfIn PDF document text
    • https://nimadelafux.weebly.com/uploads/1/3/2/6/132695392/9258863.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/pajaken-gujowoserinizu.pdfIn PDF document text
    • https://bokesavuxi.weebly.com/uploads/1/3/0/9/130968985/f61daf0c.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/resumen_del_mundo_de_sofia_capitulos.pdfIn PDF document text
    • https://guwusupokase.weebly.com/uploads/1/3/1/4/131437041/2511150.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/05751013-1e9e-4172-a1fd-0dae73938955/how_do_you_make_iced_coffee_in_hamilton_beach_brewstation.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/passive_and_active_voice_tenses.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/2727656859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be64216-b515-4535-ae30-708e34d18560/samsung_tv_service_menu_code_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a3ed76-c96d-4c79-9665-3c369ce3ac33/vikoxoruvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13516f4-7735-43fa-a973-d9d1f501f4f0/how_to_write_a_critical_analysis_essay_in_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/xukimupekarex.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/hollywood_sport_rider_se_platform_car_rack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4111c34-aacf-47ac-8ab6-9f41db70c047/49708539498.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_off0000ff53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF53 5080 bytes
SHA-256: 50d7fc07b2c9088c5b551c2f158159d943da14f51b07efd5f42cbd09c5033df1
font_01_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 10792 bytes
SHA-256: a99902a4cede3f82c4b2649310357b069ddde2ea298b226310e95f7d3736dc59