Malicious PDF — malware analysis report

Static analysis result for SHA-256 83809ca3bd740213…

MALICIOUS

PDF

79.8 KB Created: 2021-03-17 08:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d6afb6f18d9cca437260e15edabb4f79 SHA-1: 529166f140f0cf09aaf8cd7807ecc19c60dbf0df SHA-256: 83809ca3bd7402133d10bd714c86812526d543712eb94cf676caae2b27a956e3
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://druttle.ru/award?keyword=beginners+guitar+book+pdf PDF link annotation
    • http://warixedivukinat.mygamesonline.org/graphic_design_pricing_list_malaysia.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/7428776829.pdfIn PDF document text
    • http://ig-support-service.com/little_house_on_the_prairie_season_9_episode_166oyqu.pdfIn PDF document text
    • http://poradoit2.site/bipesavumuker88jb8.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/career_paths_vk.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/jfggW1t/history_of_christmas_carols_and_hymns.pdfIn PDF document text
    • http://vash-fasad.live/injustice_gods_among_us_ultimate_edition_extra_characterskd02w.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/dk6cghN/83776853624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/how_to_get_approved_for_business_line_of_credit.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/twilight_2_full_movie_download_in_hindi_filmywap.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/adobe_premiere_pro_price_one_time_purchase.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_84ebdab049c14e9b86f8c17b80139ade.pdf?index=trueIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_6e00d016b59d442b906baf61c5270563.pdf?index=trueIn PDF document text
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_01530c2f4f9f4486af6d299384899b09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokudapele/xawewux.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/advanced_computer_architecture_important_question.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/why_is_my_elitebook_not_charging.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2fdd1fe0948e4d63aad59a321dec42de.pdf?index=trueIn PDF document text
    • http://gixopiv.onlinewebshop.net/20821514704.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/27730252838.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_20f12ff5d43e47dc98ee00e10f6410bd.pdf?index=trueIn 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_off0000f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 5428 bytes
SHA-256: 656393959c70e03ba90792580885e1a4218863c40de99c928419143ecb8ad5c4
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 11068 bytes
SHA-256: 3edc5ddc109c2759059b9d083b05ddbf93f9f2ee91e1950e148960abb5b87908

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