Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce417536891bf230…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 03:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b2721efd5e2fc598c5e0448401679401 SHA-1: 99c54669b813dce677a1f20b7d616457d72a3c38 SHA-256: ce417536891bf230d5cbd3fa20ed33f6d284d4a2770e59cadc880bfd7cc521f2
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are configured as link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=what+are+the+factors+that+influence+motivation PDF link annotation
    • http://kind-insta.site/lebezunenimikowaochq.pdfIn PDF document text
    • http://bu-markett.com/sixatuvelerakanasak7xlau.pdfIn PDF document text
    • http://vugijow.iblogger.org/90331530752.pdfIn PDF document text
    • http://kamijuzexujap.iblogger.org/fatipukaxol.pdfIn PDF document text
    • http://chambrehub.xyz/minajigob8x0ep.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/field_trip_permission_slip_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/academic_year_wall_planner_free.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_09b6d10065ae4d37a6a694662cc11638.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_f025cc6948a04cbf8e3c41c5e94f77a1.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_edf8f17eed5e489c8644bdb6aa90a0e4.pdf?index=trueIn PDF document text
    • http://petifogowiga.epizy.com/paviwolerixituxipugoz.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_2dce7839392c4718a0643aa12be71b4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/welch_allyn_spot_vital_signs_lxi_patient_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/gulliver_s_travels_imdb_parents_guide.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_06bbcbfa16a04d87b19fa7643a1b0d48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/640172ae-6748-4f6c-8faa-5ddfb0121e64/maximum_strength_warm_up.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/nespresso_aeroccino_3_milk_frother_manual.pdfIn PDF document text
    • http://gimuluma.epizy.com/clases_de_canto_para_principiantes_mujeres.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/reform_haggadah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dedf92f-f349-4803-8360-9c70abd042f4/vizio_sound_bar_dish_network_remote_control_code.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_2bd64934ab7049a0b1ad5e80dfc3f87b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e44a91-1f7c-46c3-b6cb-bd57493b3bbf/33540079819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c42590-c50a-4bd5-bf66-b38dba581e7f/understanding_analysis_abbott_solutions_manual.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_off0000f3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 5192 bytes
SHA-256: 1a915ec924a0f2eae395ea499122fccb2f3c0ef0f551ab009f41ba5fb45d11af
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 11208 bytes
SHA-256: 8c7d96b9cb20c82a0c74bed938366c6f107fa29c9a60c89b0ac70f6fa9083dc3

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