Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62a66cc689d2a4a…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 08:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 854fce8916ede89f5b7c58140efa73bc SHA-1: 68e65ecb716bc16aa7f8a66139b4a73085634dd8 SHA-256: b62a66cc689d2a4a34b8bb5161c28ec68a37a339aeef64bf935b035c908f0c74
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains a reference to 'Call of duty black ops zombies apk latest', which is likely a lure to encourage clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://medvor.ru/pbw?utm_term=call+of+duty+black+ops+zombies+apk+latest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6050fd87d5181.pdfIn PDF document text
    • https://nagofojog.weebly.com/uploads/1/3/4/5/134586362/9958638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_60b87cb32070f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_606e840a99377.pdfIn PDF document text
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/gegivevosogagomujedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_600e59fd0fefd.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/634a336e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_6062be0d9fee7.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/popuvep-kerabip-dofigejorovit-bunuvino.pdfIn PDF document text
    • https://zaxanedipujez.weebly.com/uploads/1/3/4/5/134582154/sizasoferuluxip-wimogunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisiwovad.pbworks.com/f/shrek_4_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ad37f1-165d-424b-bedb-950ca29017aa/how_to_deep_clean_kangen_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247386f2-a9a4-494a-ba3e-b3e237d6acfd/how_do_i_reset_fitbit_charge_hr_to_factory_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fa7f35-d743-45b4-89eb-ec71ad2cbcc0/durarokaw.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/f/3_dimensional_shapes_worksheets_for_second_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a7804c-7fd0-42eb-a969-f016bba8c45b/origami_heart_with_construction_paper.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/21483239435.pdfIn PDF document text
    • http://paditoxef.pbworks.com/f/heat_and_mass_transfer_data_book_9th_edition_free_download.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/what_is_difference_between_histogram_and_bar_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ae762-efaa-4d39-8bf3-2b9a700a6a14/honeywell_pro_4000_heat_pump_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e4cb5a-5d9e-4d36-a9ae-165e77fae52a/30146226902.pdfIn PDF document text
    • http://jisopubo.pbworks.com/w/file/fetch/144807888/estimating_decimals_worksheet.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/f/descargar_aplicaciones_android_gratis_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20eaaa98-debf-4632-8b48-49a48d09a8cb/legam.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_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 5464 bytes
SHA-256: 41ff11ae9d39b4288caacc479e0754750c2ebf3073d58539c610abf0620913cd
font_01_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 10516 bytes
SHA-256: 8790003d03efe87d943baa61818bdf5c0d346d3419f11b608fe368e698ec31e1

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