Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dd033ef420baf1…

MALICIOUS

PDF

141.2 KB Created: 2021-04-01 02:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d1e4f7d98926637ae557a64666e0529f SHA-1: e99c94ab9f41ea6f7793dd04b71995ce34962973 SHA-256: 27dd033ef420baf1888376788b152f9253ba266d97ea6e43ddb3d9cd2bf41228
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The presence of external URI heuristics and the PDF_SEO_DISPOSABLE_LINK_FARM firing further support this, indicating the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://bologen.ru/wix?keyword=ifakara+health+institute+morogoro PDF link annotation
    • http://afracheat8.xyz/how_to_remove_seiko_watch_winder0o6fl.pdfIn PDF document text
    • http://siteznakomstv69.space/tegarepesarug08rj.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/nutewux.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/camila_cabello_and_shawn_mendes_vma_performanceeks5x.pdfIn PDF document text
    • http://lnstagram-helping.live/connected_devices_platform_service_stoppedjx27m.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/fishing_merit_badge_workbook_answerstkpc1.pdfIn PDF document text
    • http://cmb-eco.com/59109789323b42pz.pdfIn PDF document text
    • http://relax35.ru/61743368339zt2fe.pdfIn PDF document text
    • https://gunarolapikomi.weebly.com/uploads/1/3/4/4/134442839/kupurige-durunibaf.pdfIn PDF document text
    • http://venira.su/vupenutusevumugiwerl3e9a.pdfIn PDF document text
    • http://daxamel.mywebcommunity.org/lokoxovi.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/simple_english_test.pdfIn PDF document text
    • http://hookup754.fun/30375957095vclsw.pdfIn PDF document text
    • http://koreanluxe.com/corporate_finance_4th_edition_by_ivo_welch2zl6i.pdfIn PDF document text
    • http://citruss.space/kipizorafulunilarekazokeh17b.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/pikisojegorof_bikefata_vupikonemeri_runujuwigokanow.pdfIn PDF document text
    • http://walletelectrum.buzz/396272794185bh4l.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/20299542050.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/vijamuv_jafoxukuxi.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/melav.pdfIn PDF document text
    • http://sis-paypal.com/can_you_keep_a_secret_film_trailer_ita035di.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/fanepisigiruteoki0r.pdfIn PDF document text
    • http://megalit-korolev.ru/the_new_bible_commentary_revisedwvqxy.pdfIn PDF document text
    • http://gufutaca3.xyz/sistema_hexaxial_de_baileyun13w.pdfIn PDF document text
    • http://salonlabs.xyz/how_much_is_it_to_refill_soda_stream_gas_bottlea8zur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwuriru.onlinewebshop.net/adapting_to_obesity_with_adipose_tissue_inflammation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 66760 bytes
SHA-256: ccad7dddd8c832304f05fe025f591b41c91a649dfcfc5d1e3c2c219707e8067d
font_01_sfnt_off0001db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB47 5180 bytes
SHA-256: a345ff855a50f2e1909dd007cf6291262bc4694029a5c20af85c34aff8e2a7c3
font_02_sfnt_off0001ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECC6 20440 bytes
SHA-256: d6c1baa639d089c24e1e11c5d0be3ee120c5af9debe03534e693c0064d75b2dd