Malicious PDF — malware analysis report

Static analysis result for SHA-256 2175306488eadde8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 04:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62f79e362f7850d9a375f4cb4882751 SHA-1: 6489c50a111b31292acccf67433347f20c63d1fa SHA-256: 2175306488eadde8b1665e4c4751aaee41db39f1d8f8430c082221d81951542f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, characteristic of a link farm or phishing campaign, directing users to suspicious domains like 'midufefew.ru' and 'kapabifidi.sportsontheweb.net'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=surface+awaken+treatment
    • http://kapabifidi.sportsontheweb.net/20861111132.pdf
    • http://sugameloxufe.mywebcommunity.org/jiboforazusofame.pdf
    • https://cdn.sqhk.co/zapajugadira/hTm7ijF/xomozob.pdf
    • https://cdn.sqhk.co/zavilisuga/gg97Ojd/apple_iphone_ringtone_remix.pdf
    • https://cdn.sqhk.co/mujawiru/jdXhdzN/4_immagini_1_parola_soluzioni_6_lettere_cro.pdf
    • https://cdn.sqhk.co/numavagoko/vWuVgfb/10870978762.pdf
    • https://cdn.sqhk.co/nepajenine/dieA3Eh/81391651310.pdf
    • https://cdn.sqhk.co/bigulikexupa/ig7qayJ/eve_portal_login_failed.pdf
    • http://wovuwukotuvoxi.mygamesonline.org/stages_of_typhoid_fever.pdf
    • https://cdn.sqhk.co/vigesiji/icifnij/president_buhari_speech_today_27th_april_2020.pdf
    • https://cdn.sqhk.co/kepozote/ojbgfji/escanor_ultimate_one_vs_meliodas.pdf
    • https://cdn.sqhk.co/badaxiloru/Ciagkjc/kidufeb.pdf
    • https://cdn.sqhk.co/xazururoxe/yjehiij/ice_cream_coloring_sheet_free.pdf
    • https://cdn.sqhk.co/jizuxadif/anij2JP/x_runner_nottingham_2020.pdf
    • https://cdn.sqhk.co/nezuxada/jXgU9KL/diafiltration_buffer_exchange.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sesafefanulokam/826125721.pdf
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_47ce6de0b0ae4af98cc8d3c74bb36dc1.pdf?index=true
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_969678fc12e94cbab56905a3c56423ee.pdf?index=true
    • https://s3.amazonaws.com/ravuxudibure/abridged_annual_report_definition.pdf
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_f4fd369474eb46fe86490d0d316593ae.pdf?index=true
    • http://furunes.onlinewebshop.net/senior_digital_marketing_manager_salary_nyc.pdf
    • https://s3.amazonaws.com/dorobukasawituw/crpf_full_form_video.pdf
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_2dced16c46344a37820bc125195acfc2.pdf?index=true
    • http://nubibubimalepik.atwebpages.com/odisha_govt_holiday_list_2020.pdf
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_eeec9eb6ddd34a29820ced7f1167ad44.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f456.bin
10c17df2fc68fdea0c9b755c9d0ef3a478093c8566fd2574adca28c2db917dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 5076 bytes
font_01_sfnt_off00010598.bin
116dbd6637383cb31755fe3f42ad5c5cf4d272ed41ff32cc44b395da148a53cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 11312 bytes

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