Malicious PDF — malware analysis report

Static analysis result for SHA-256 96aef22066f6c890…

MALICIOUS

PDF

87.0 KB Created: 2021-06-05 10:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c9d1d1237c4cb6b494067802945cd8e SHA-1: 3e4d1d161e73f0fc69ebaa120778acc46f7bf7a6 SHA-256: 96aef22066f6c890303b053daa783fc036d2ccc1b364ff19d27d836b835451ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://xajibur.ru/123?utm_term=vaikom+vijayalakshmi+songs+tamil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488810/normal_606a2df3785d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5fd09e3cbb53e.pdfIn PDF document text
    • https://xufuluzigi.weebly.com/uploads/1/3/4/2/134266078/mexemovibuni.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/gotule-zosabezume-pebapovaven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144516111/how_to_play_zombies_online_with_2_players.pdfIn PDF document text
    • http://jinotofatum.pbworks.com/w/file/fetch/144606180/57370953698.pdfIn PDF document text
    • http://vasoxekisede.pbworks.com/w/file/fetch/144642975/40396093521.pdfIn PDF document text
    • http://paditoxef.pbworks.com/w/file/fetch/144522381/how_to_perform_hepa_filter_integrity_test.pdfIn PDF document text
    • http://pefumugat.pbworks.com/f/subaru_impreza_wrx_sti_2018_for_sale_uk.pdfIn PDF document text
    • http://japomajuxire.pbworks.com/w/file/fetch/144441828/tablo_grafik_okuma_ve_yorumlama_sorular_trke.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144424032/how_do_i_cancel_my_expired_registration_in_ct.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/pegob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba307c38-8275-4862-ac41-b7548d6a54a9/electrolux_microwave_service_center_near_me.pdfIn PDF document text
    • http://rutarotovez.pbworks.com/w/file/fetch/144645969/livro_direito_empresarial_esquematizado.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144646014/gonixunezibaw.pdfIn PDF document text
    • http://mituxap.pbworks.com/f/melowubolovalalegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97557a1d-dfbc-45e8-afc0-84d14e033ee1/safety_1st_guide_65_sport_convertible_car_seat_manual.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144502557/best_buy_student_discounts_laptops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f08b78a-c6d4-4dc3-980c-0b8133374f33/bujitenulibafufazopa.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_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 5272 bytes
SHA-256: 5bf423f0b23a3c4a0014f65bf01d80b31c30d45dc8282ede32c370989c09474b
font_01_sfnt_off00012984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12984 10504 bytes
SHA-256: 59c64afc5bb786cd4bd67d8edafc216022df3ffcca49474a16cf600e47554fe7

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