Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58845f3df15645c…

MALICIOUS

PDF

68.4 KB Created: 2021-04-07 05:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9dce8c8c3df607445ca64484ce174359 SHA-1: 237412ab504e952ec9034b5f6a8d1c1e2a364957 SHA-256: e58845f3df15645c93bdad464d6f0f6c19686679f92f3c98af68eaedd4c0544c
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 0.9996

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://golowaki.ru/wix?keyword=florida+contractors+reference+manual PDF link annotation
    • http://rovanenafet.getenjoyment.net/stages_of_embryonic_development_in_humans.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/usos_y_aplicaciones_del_benceno5s6qo.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/isoniacida_mecanismo_de_accion.pdfIn PDF document text
    • http://counterman.ru/resogosabokuzibuwatalakg79w.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/djjriaV/63873659358.pdfIn PDF document text
    • http://lasns.fun/marooned_pink_floyd_tabrunf9.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/statistical_tests_book.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/18498873006kq69h.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/38211545692.pdfIn PDF document text
    • http://memisada.mygamesonline.org/big_data_survey_technologies_opportunities_and_challenges.pdfIn PDF document text
    • http://pifadopagel.scienceontheweb.net/ace_academy_books_for_civil.pdfIn PDF document text
    • https://cdn.sqhk.co/pivatiwon/hfjeVjb/tikiwezidajorapemuvo.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/cloistered_cleric_pathfinder_2e.pdfIn PDF document text
    • http://daxamel.mywebcommunity.org/junapuruz.pdfIn PDF document text
    • https://cdn.sqhk.co/vavegewumur/kjcal1e/pokiragixofibarokurijozub.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/adobe_acrobat_to_word_converter.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/85251776152.pdfIn PDF document text
    • https://cdn.sqhk.co/volinafi/hfghjjO/fekugimowuwadonuxilut.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/gg2Egda/tower_defence_zone_3_mod_apk.pdfIn PDF document text
    • http://lishop.site/dasar_mekanika_tanah4jxgd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepafelixadu.onlinewebshop.net/banking_system_project_report.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/4685119298.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_off0000cfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA3 5124 bytes
SHA-256: 9b89afb1ced4a041dd4bd8af56a0c3cfbce4805b38c8913203134493ef37d0dd
font_01_sfnt_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 10400 bytes
SHA-256: cafaeeb39b31864e4ffab2a1b0a03120e7c26c9b65b9fcdcc9523afae8693121

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