Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aea633d3fd155e7…

MALICIOUS

PDF

79.7 KB Created: 2021-03-07 17:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 446aa3e91138f607deb5ae6fb724b83c SHA-1: 9710d3b282838208f1e565eb83200cfe3bd9fc26 SHA-256: 2aea633d3fd155e796ed8ebc4af4a7657587219c1a2bd497183630c0e2004efb
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 0.9997

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://lozipotod.ru/strik?utm_term=erik+erikson%2527s+stages+of+development+journal+article PDF link annotation
    • https://cdn.sqhk.co/kulobuwaxegu/9shfqij/wujazekelaje.pdfIn PDF document text
    • http://prizinsta.site/232660112598z1gn.pdfIn PDF document text
    • http://albl.ru/judgement_s_classic_wow_alliance_leveling_guide60hhc.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/riijggf/denali.pdfIn PDF document text
    • http://trokot-shopnew.online/skywalker_trampolines_12-foot_jump_n_dunk_trampoline_with_enclonxlhy.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/0hbjcjc/27594760703.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/OgfPVUr/mobiruwirakaleboju.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/ifKibgh/happy_number_painting_by_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/sjfnuhj/idle_express_mod_apk_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/5jgxteg/delelipoxujed.pdfIn PDF document text
    • http://supernefritroller.xyz/how_to_sell_options_on_thinkorswim_mobilehu5hy.pdfIn PDF document text
    • http://allroadkamchatka.ru/34800857811d8b8x.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/ihnAVS7/menudasubadejojan.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/how_to_watch_little_fires_everywhere_show.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/JgeRdco/prop_hunt_gmod_workshop.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/g0Pfdhi/whatsapp_notification_sound_iphone_not_working.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/lusabifef/adform_annual_revenue.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/reducing_air_pollution_ielts_listening_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/cognates_worksheets_for_second_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/avery_labels_21_per_page_template_portrait.pdfIn PDF document text
    • http://mobukug.myartsonline.com/gufumufixujaxeloluwolibu.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_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 5668 bytes
SHA-256: 9ff06fc514b37b6d90a69ec88651a992372caefcf71b3770dad6410fa5f17aae
font_01_sfnt_off00010eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 10052 bytes
SHA-256: cb3ae98837f310f12278e0b3a25ee593c5c47c44456feb885407ce3725afe05b

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