Malicious PDF — malware analysis report

Static analysis result for SHA-256 4798904a069d545d…

MALICIOUS

PDF

76.2 KB Created: 2021-06-08 09:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b7d9361a8ecc6fc375a8f180991781cc SHA-1: a7344711a10046c4a32b8ac26fb4ea744c4e2f9b SHA-256: 4798904a069d545d194cf0439353dc871f9acf4b16ff79ec2353dd88c2f5e26e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9023

Heuristics 4

  • 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
  • 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://irlanc.ru/pbw?utm_term=%25E0%25AE%25A4%25E0%25AE%25BF%25E0%25AE%25B0%25E0%25AF%2581%25E0%25AE%25AE%25E0%25AE%25A3+marriage+biodata+format+in+tamil+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366947/normal_603a84d0323ff.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4459464/normal_60b20ad7e789a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_602b6042ecf84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_60be885617011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_601aacb824ab3.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/2a5cd16f-366a-41ff-bbbf-f72392e28e86/cual_es_el_mejor_momento_para_quedarse_embarazada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e87ab1-14a2-4170-a81a-d0a9c37346d7/lidal.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/zuxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579d78c2-47dc-4aa3-944b-fb5a6a0d757e/miller_bobcat_250_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2cb402-2730-459b-bc94-041f5c150538/how_to_find_public_autopsy_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a749678-d321-4bc6-90c4-68900ace5cc7/can_you_attach_any_car_seat_to_any_stroller.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144467952/unit_1_geometry_basics_homework_4_answer_key_gina_wilson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b72e7ed-db46-43f8-8572-b052d2c223d8/jupisip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb72ebc-b7df-4e81-af34-f0f5f01fb64d/bovorasegigumiguzevino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4d9296-3fc6-4a56-a59e-f58445bb6615/84638750204.pdfIn PDF document text
    • http://vonodatob.pbworks.com/f/vexabegatafogonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2cd377-8a29-4ecb-8a79-83e8a529109e/whats_the_coldest_city_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b61fbe5-b078-4101-9564-3d6f65fcb1e3/vufilezuxu.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/nutaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f78592-3838-4a10-9fc7-f2bfd87c5cc1/remington_700_sps_30-06_springfield.pdfIn PDF document text
    • http://zefavorase.pbworks.com/w/file/fetch/144837777/is_it_ok_to_burn_3000_calories_a_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152bdda8-d2c0-4bcf-b6f0-02ff1f993796/how_do_you_turn_on_a_consumer_cellular_flip_phone.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 5228 bytes
SHA-256: c3a7aa28aa1895a862f457b6438ac6b93ee89564d9d6b95769626772af3a5d10