Malicious PDF — malware analysis report

Static analysis result for SHA-256 db096f27f4cfec3e…

MALICIOUS

PDF

78.9 KB Created: 2021-04-12 04:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e486efbb1d6ba4ee34d268db79f7757 SHA-1: 10e657d6da4226bd975fd3ae63c5b7a37fa8ff15 SHA-256: db096f27f4cfec3e2dcf6075cfed7f8e4c6e10d91f13ee72f5b3d1f235579a1e
96 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 0.9998

Heuristics 4

  • 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.
  • 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://nipisod.ru/strik?utm_term=black+and+decker+cordless+weed+trimmer+reviews PDF link annotation
    • https://cdn.sqhk.co/fewoxenovof/72v0Yii/terranova_bakery_bronx_ny_10458.pdfIn PDF document text
    • https://cdn.sqhk.co/bipukawu/UqCKcaJ/wuditanokipi.pdfIn PDF document text
    • https://cdn.sqhk.co/regisanozoxo/ihK81je/cabify_driver_argentina_requisitos.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/cbjgFNW/foxirekimok.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/4Jejg4v/88498613766.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/ifjjKba/boyfriend_gift_plush.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/elUNDaj/957269979.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
    • https://s3.amazonaws.com/gedexim/keurig_mini_black_friday_2019.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_d38ea820b92f48a397a9259d5b13f544.pdf?index=trueIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_b48bd282dff24e07be9dfe243dbbf92f.pdf?index=trueIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/gta_vice_city_all_cheat_codes_free_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/pepimifetomuvanuwigokiki.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/66312736517.pdfIn PDF document text
    • http://daximogosamov.myartsonline.com/saying_numbers_in_english_exercises.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/9th_grade_holt_biology_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/wuwolazeridakeguxu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/brampton_manor_sixth_form_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/jupomebotagafan.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/7077028757.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/world_economic_forum_tourism_competitiveness_report.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_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 5140 bytes
SHA-256: 768f2daab9a6b7240daefc42fdb30989c31e718365ff1ea65a7cb60b05af2992
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10844 bytes
SHA-256: 36755e3319562dfe84ddae2d53291baa628b94ceb2b069bb43f92e602bdef4a4
font_02_sfnt_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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