Malicious PDF — malware analysis report

Static analysis result for SHA-256 b302a284db7e327a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-25 11:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c4f0b86a37ccf789bb2fd4485c8aa54 SHA-1: e8a2c31884e48a7997ee069897b5f5fed5a082b8 SHA-256: b302a284db7e327a943990f623e725b60b3dd07223de027d0d55ce43f706b3bd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, masquerading as a search result. The 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger network of linked PDFs, suggesting a coordinated effort for SEO manipulation or traffic redirection. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://jumiwimov.ru/award?keyword=markup+pdf+on+surface+pro+3
    • https://xudisuwovoj.weebly.com/uploads/1/3/5/4/135400752/pugidu.pdf
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/doganelima_dovawupedal_wesurewu_jolepezemun.pdf
    • https://cdn.sqhk.co/kusonemap/OfjeTij/motorola_baby_monitor_manual.pdf
    • http://bolipoloweda.mygamesonline.org/lesotho_work_permit_application_form.pdf
    • http://pelinebaj.mypressonline.com/kebopixex.pdf
    • http://rezokivi.medianewsonline.com/manitol_vs_solucion_hipertonica.pdf
    • https://cdn.sqhk.co/valujoper/Eicjjww/deceitful_devotions_romance_otome_game.pdf
    • https://zegokovoni.weebly.com/uploads/1/3/4/3/134323662/1849280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gomaxod/metformin_xr_for_pcos.pdf
    • https://s3.amazonaws.com/zugutixe/70068125270.pdf
    • http://masusoxowep.onlinewebshop.net/principles_of_management_project_class_12_on_mcdonalds.pdf
    • https://uploads.strikinglycdn.com/files/7f443a2f-cab6-415a-b083-c75bc6d7be4c/ejercicios_de_limites_laterales_con_grafica.pdf
    • https://uploads.strikinglycdn.com/files/80d654be-30e7-4794-8a92-e164344b0d62/molecular_biology_jobs_in_canada.pdf
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_1c52c1d3df47437db6e57bee9615703e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/107f19dc-d363-4d2a-bf16-cd7ca1b95df7/ninuzedilixitigexuvowu.pdf
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_fe1d729309fc4df7a866c4d9099e8a6f.pdf?index=true
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_d3cd7685b9b4407d94bf329d008ea50a.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_60428dc9c05c479ba41c05ba7c9c3159.pdf?index=true
    • https://uploads.strikinglycdn.com/files/47956c5f-0ee3-442f-9519-8d6b92f14771/ap_physics_textbook_giancoli.pdf
    • https://uploads.strikinglycdn.com/files/c2829ada-8fb4-409e-9b5f-9607b5fa334c/description_du_tableau_le_voyageur_contemplant_une_mer_de_nuages.pdf
    • https://s3.amazonaws.com/sepawi/carroll_diagram_worksheets_shapes.pdf
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_abef55d1aae442faaa544b7e21f820da.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec82.bin
671e4d3ee9c48a5309e4f789ea7d19ed376529ffd10b8d07bc9d38723e7dc78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 5348 bytes
font_01_sfnt_off0000fed5.bin
e767435b1b66c685dd372763cf5036b5faecf32ed9518325fc4f7464da6e3285		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 10784 bytes

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