Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfc9c2fcd6e1698…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 03:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6945483ca386a31eb062a155766bd329 SHA-1: ecdef6807da2c36d72fb3fdbfcf22836c2e79925 SHA-256: 5bfc9c2fcd6e1698e11c47888593974ae5eb72e4adb5c96c6ed1b1c619d14e90
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=nj+central+craigslist+jobs PDF link annotation
    • https://cdn.sqhk.co/tokafumotebi/Bm9AWij/21895744203.pdfIn PDF document text
    • http://trysoda.club/56777532605kydd4.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/tekovot.pdfIn PDF document text
    • http://wobixoka.66ghz.com/77752087957.pdfIn PDF document text
    • http://sportita.fun/272700677102wzrq.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/WMP48gh/26155750319.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/a_divina_comdia_resumo.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/62jjIMU/ludabivutejolajetomija.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/bumivamanuwenip.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/xerox_workcentre_7845_cost.pdfIn PDF document text
    • http://kreativoblako.com/goo_goo_dolls_long_way_down_guitar_tabeuvzl.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/regan_grimes_bulking_program.pdfIn PDF document text
    • http://espaceabonne.com/185874829299ynlq.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/occupied_america_a_history_of_chicanos_chapter_summary.pdfIn PDF document text
    • http://whowill.ru/how_to_use_braun_thermometer_bnt400h02rj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jomupaz.myartsonline.com/current_affairs_2020_in_english_with_answers.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/tutivute.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_b796ea878c3840f3a1f4f0537d348aec.pdf?index=trueIn PDF document text
    • http://bosefijov.epizy.com/c_diff_acg_guidelines.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_9ef9d81f43a5412693ab5f62a11b9247.pdf?index=trueIn PDF document text
    • http://vumafovixono.rf.gd/3d_printer_filament_types_and_uses.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 4940 bytes
SHA-256: 8a2af21e797680079c131b8482d833dd8ff191afc762583b3643422b38b78239
font_01_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 10536 bytes
SHA-256: 0294926eeaa30f5039a9c1b43ab99b193e72fcdcb71357e2861177a50c05157b
font_02_sfnt_off000117e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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