Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c7f59f850d6dda…

MALICIOUS

PDF

108.2 KB Created: 2021-06-10 07:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 752785d2cde920a1387412f8c8438f07 SHA-1: ea237abc7365fca792aa7007b8fea805f15050c3 SHA-256: 06c7f59f850d6dda8e80e2ad333afb10dd204595727424faf2c03006d071d9ce
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/pbw?utm_term=cambridge+11+test+2+reading+answers PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fokojifidesi.pbworks.com/w/file/fetch/144515256/lubemafojaralemi.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/f/dukeboten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e109c4a9-a7fb-4f49-ac18-2dabf2eb8c51/wadibuxuzufixiwoxowune.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/f/how_to_choose_double_wear_foundation_shade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c63e09-6ab0-42f2-9b18-ebefd4b00a3b/how_to_pair_plantronics_plt_with_iphone.pdfIn PDF document text
    • http://xavewop.pbworks.com/f/career_map_template_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadf9432-1a69-48bf-a81e-7d9fc56b9f8d/bepakaweti.pdfIn PDF document text
    • http://jeveriwilum.pbworks.com/w/file/fetch/144835932/airbnb_design_system_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0770e87d-0ee4-4990-801d-d43579d6e3c7/1519269694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389af278-33e8-49d0-885d-ec1e26e5f56b/rakavawebikexunuxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fdcb02-72e0-4374-8012-6a715c903695/what_does_the_jungle_symbolize_in_heart_of_darkness.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/download_gta_5_ps3_iso_highly_compressed_for_android.pdfIn PDF document text
    • http://kigiputilik.pbworks.com/w/file/fetch/144678453/puxeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492f9ef9-2f85-4485-9e79-d8918a103e82/ap_human_geography_terms_unit_1.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/problemas_con_numeros_decimales_5o_primaria_para_imprimir.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/gta_4_download_for_pc_highly_compressed_in_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f38627-1135-4dbb-9011-08130bfaf4ea/kisixovadizevowikozoresi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ef89fe-be36-4593-bd2f-cb21c0a4e5c3/29834200882.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/hollywood_movies_telegram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31285eb6-003f-4f5f-afbf-7a1dd0d375c9/pinemaludij.pdfIn PDF document text
    • http://guvevef.pbworks.com/f/nozusaso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1C 5228 bytes
SHA-256: f3afc968535751d0bd69edbcbb3aa37699472dfaebb8366d662c86c7d614d555
font_01_sfnt_off00016dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DDA 10808 bytes
SHA-256: 3efe46b950d4821d038a074e69afd162e71dde76aede0a87afc9f35377e27c0a
font_02_sfnt_off000192b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192B4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34