Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92faeaa03470bae…

MALICIOUS

PDF

76.1 KB Created: 2021-03-08 16:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 37fbdcf44c179c093fea61aa1a2e19c1 SHA-1: 1f48521adfed765af6e0eb1921f513bf1f9c518f SHA-256: e92faeaa03470bae9792daa9270f26c27bede5dfe3dd5664ed482f775cc1f89f
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL hosted on 'kuzutuzo.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6626

Heuristics 4

  • 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
  • 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://kuzutuzo.ru/award?keyword=report+writing+format+in+english+pdf PDF link annotation
    • http://gosoxegekiri.mywebcommunity.org/wogaruxerepubelovujusura.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/21209901375.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/how_to_use_steam_setting_on_whirlpool_duet_dryer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/940d0468-4d46-467c-8215-6745f53dfc6b/anker_bluetooth_tastatur_ipad_mini.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/cisco_ccnp_books_free_download.pdfIn PDF document text
    • http://xakalegej.epizy.com/how_to_fix_dryer_that_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b58e8d-09cf-4f44-86f1-888c573e2056/how_to_convert_paint_image_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c706cb92-a0c2-45b9-a774-813fac81cf6e/there_are_three_types_of_compound_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1665a96-f34b-472c-8db3-3bd870edddf6/forex_price_action_scalping_bob_volman_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c688551d-911b-40ce-b553-ccfbabcd2bec/86267611764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ca86dd-a062-4463-a989-add3cacce6a1/what_is_the_commonest_word_in_the_bible.pdfIn PDF document text
    • http://tawegoju.rf.gd/74945989541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae00d1a-5235-49e2-9169-f70e09e09a7e/belabokitexexibotutepol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b404df5-e809-4498-a9aa-a1459deab4a7/pujovawarazegejijizifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b420808-e305-4966-a66f-8c743db32086/what_is_curriculum_design_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965013f0-f104-4f8b-94af-f815dd109a97/jekezolinokurejole.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/rain_bird_5000_sprinkler_adjustment_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7568996d-4f1e-4fb9-9fa1-75398151efba/27727824915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fb4e67-a473-4f81-84a4-6648b492a51d/berasajarunoxiwozovazoru.pdfIn PDF document text
    • http://xowiweruxuz.epizy.com/netgear_ac1900_c6300bd_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6626fb-1278-4ef2-ab5e-c9c313779353/78080153906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331c28dc-5d62-424b-bd08-4b33fef7893a/miniature_dachshund_puppies_for_sale_ca.pdfIn PDF document text
    • http://tovedutineve.rf.gd/48616687707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730a449d-e861-43a1-bd6d-ea7455b10b7e/6529889922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71c2748-bba6-456b-ab9c-1fff933aa840/data_analysis_software_market_share.pdfIn PDF document text
    • http://fopebuzab.epizy.com/community_medicine_mcq_with_answers.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 5552 bytes
SHA-256: fae99a6a20e2b443e8579792e58c1f37f80e484b7f4bc72f06bc30829bd5cce4

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