Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e72dab9d1030bae…

MALICIOUS

PDF

70.6 KB Created: 2021-03-30 03:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c3698f2f036d744d9a70aebd7544533f SHA-1: 5952136ee0ca50a0d7f0fcebff1d0a6c173ab6ab SHA-256: 6e72dab9d1030bae9c5db7cfad9b5bdb96cc3b1fd1f1d38d903e0a4d4e2e11d1
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://gimoguvi.ru/123?utm_term=changi+airport+group+annual+report+2018 PDF link annotation
    • http://simamopi.22web.org/mirae_asset_mutual_fund_sip_form.pdfIn PDF document text
    • http://lebadatow.22web.org/what_bottles_work_with_sodastream.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/OFjahe2/warship_attack_3d_mod_apk_free_download.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/dizixenikusiv.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/iaLD2Tf/my_talking_pretty_girl_unlimited_money.pdfIn PDF document text
    • https://tiguziriwisil.weebly.com/uploads/1/3/1/0/131071210/4163804ec7.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/jorgewo/61849275223.pdfIn PDF document text
    • http://eurosett.net/english_as_a_second_language_teacher_training3u61i.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/b47e561443.pdfIn PDF document text
    • http://kigajekuterol.iblogger.org/sweet_good_morning_photos_free.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/orbit_57896_wiring.pdfIn PDF document text
    • https://xesizoge.weebly.com/uploads/1/3/1/4/131452949/zimopezibatis-diwoxawodi-pototomo-radorufe.pdfIn PDF document text
    • http://gbo.guru/turudeweradiulz8n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/dafolukakanevazozonimusu.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/tegidarixejaj.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/used_schwinn_230_recumbent_bike_for_sale.pdfIn PDF document text
    • http://xorikija.epizy.com/gabij.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/938779255.pdfIn PDF document text
    • http://zuloxuso.epizy.com/i_m_a_believer_shrek_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/62668723600.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/online_project_management_courses.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/adobe_acrobat_reader_dc_pro_free.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_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 5328 bytes
SHA-256: 85a0b8e58098df1bb8ebed200b06cdebc6b0fed5fc3b0a47b19f91ee9a75b5f4
font_01_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 10880 bytes
SHA-256: 00349fc5e74ba95423cae6e1e3e6ae31b8432c37dd605074159989565a34f300

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