Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c64ae8072548374…

MALICIOUS

PDF

78.4 KB Created: 2021-03-05 18:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af1dc3790e65b1e3f71c3b41771a65a SHA-1: 4ef33c662715d49173b085e8fba5a4d596bd1caf SHA-256: 2c64ae8072548374e33a2ec35e77480a6af51dbdad914d78b6f3630fa2305e23
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL pointing to a site related to 'magic the gathering decks'. This heuristic, combined with ClamAV detection and ML classification, strongly suggests malicious intent. The embedded URLs likely serve to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/aws?utm_term=best+modern+magic+the+gathering+decks
    • http://bumasujofoj.getenjoyment.net/98604999782.pdf
    • http://bapatavusirave.mygamesonline.org/ludojijozazemosa.pdf
    • http://fosipuzo.mypressonline.com/43535871279.pdf
    • http://jalazekesofijot.medianewsonline.com/behringer_inuke_nu4-6000_amplifier.pdf
    • http://fosonelotila.medianewsonline.com/gexalurop.pdf
    • http://nokasosozigof.mypressonline.com/how_do_i_program_my_philips_universal_remote_to_my_sony_tv.pdf
    • http://fexevewuli.mypressonline.com/wall_street_journal_magazine_instagram.pdf
    • http://mamafiposorugul.sportsontheweb.net/gagabagukuso.pdf
    • http://nigavereke.mygamesonline.org/kudiga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pulavokaxe/whatsapp_gold_for_iphone.pdf
    • http://vimixof.onlinewebshop.net/bluebook_citing_court_documents.pdf
    • http://zitadufafasid.onlinewebshop.net/aplicacion_para_monitorear_mi_red_wifi.pdf
    • https://s3.amazonaws.com/verirejon/tuvokato.pdf
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_56ac4fe7d40d4772b3230b1c866af6c6.pdf?index=true
    • https://s3.amazonaws.com/setaxilitozuko/how_much_does_apple_cost_to_repair_screen.pdf
    • https://s3.amazonaws.com/kukazowox/lightroom_presets_free_zip_for_pc.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_fa79e9188e914c4db76c8d215fd3271b.pdf?index=true
    • http://bufijonewufo.onlinewebshop.net/thank_you_for_being_late_book_summary.pdf
    • http://zikoliduxa.atwebpages.com/2784434126.pdf
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_b5e495abf6d846ffb9e379d194bd97f1.pdf?index=true
    • https://s3.amazonaws.com/fosagoba/avon_anew_age_transforming_compact_foundation_review.pdf
    • https://s3.amazonaws.com/xakapudakadu/ssrs_report_header_first_page_only.pdf
    • https://s3.amazonaws.com/tasufagijaremo/ap_world_history_practice_test_booklet_answers.pdf
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_713adecb1a654bc4a999b421a64c8058.pdf?index=true
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_06e2d47d24c44053b14c816fa88b62ed.pdf?index=true
    • https://s3.amazonaws.com/zoromexemuzid/sefezidegiwonaf.pdf
    • 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_off0000f49b.bin
74ac4942c9d0ce64c8ab497402afb858b5fe2169078eed7ff1c5ccfe45597c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 5432 bytes
font_01_sfnt_off000106eb.bin
5fbd5d09ebecb529862fd39bfb0ff680fdd3b1174fd2a62b58b3fae4b23e6b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106EB 10784 bytes

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