Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd5b5f0790b28d2…

MALICIOUS

PDF

75.6 KB Created: 2021-04-06 17:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fa42c82395fd2c239cf96cc1c833fa73 SHA-1: 8a05848241f329417264cf4d47fb14c045beb2fc SHA-256: 6cd5b5f0790b28d2a64cdaa4141a40a1ed4f7159900b84df20edd052d30acabc
126 Risk Score

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 0.9997

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://xezojetit.ru/strik?utm_term=plantronics+cs530+instruction+manual PDF link annotation
    • http://hot-money.fun/4017408192488dk7.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/kenmore_series_700_washer_error_code_du.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/segmentation_international_marketing.pdfIn PDF document text
    • http://everydays.space/feedback_control_of_dynamic_systemsj32ei.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/stock_market_tips_for_beginners_india.pdfIn PDF document text
    • http://naturazuwedemoz.22web.org/game_hacker_appvn_apk.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/61781144619.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/security_analysis_benjamin_graham_ting_vit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_c8189dd49182436da7e7af1d886b6e36.pdf?index=trueIn PDF document text
    • http://rupeguv.epizy.com/windows_8_animated_gif_wallpaper.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/fally_ipupa_inama_mp4.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_51f78aaeb52645faaee6308ec5f520b9.pdf?index=trueIn PDF document text
    • http://lijilivini.epizy.com/pifapesajazetixopitagexat.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_c541fe5d6980474c9dfc401b13ca48e9.pdf?index=trueIn PDF document text
    • http://vakusidoler.epizy.com/14494339571.pdfIn PDF document text
    • http://dafesofuxub.rf.gd/anaganaga_song_from_aravinda_sametha_free.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_6ad1f3c4c3604025a92d2ea5ed8faeed.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_4f870e498961400887b18429b0adf50a.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_dccd31cf1502496683aa18c97ad5db6c.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_2e95bf0adb314e4f83bbf6b600f07241.pdf?index=trueIn PDF document text
    • http://tokegavewori.rf.gd/akai_ewi_5000_setup.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 5376 bytes
SHA-256: 52fd0bb0fed8ecf2b5e40c8b307dc9eb1722809315e252d0561a2e3df80d2147
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 11064 bytes
SHA-256: 8a8d42a9395d56bf1c7969b2e1b3bb445c4e555baefd9bcaeec9c8dd2d3333ac

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