Malicious PDF — malware analysis report

Static analysis result for SHA-256 7519a45d9c5d74b1…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 22:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 14ff73c46704dd3e2cc25b1705d8a9a6 SHA-1: a6289def83c580edcfe0400fefa22bd3c2fc5bf6 SHA-256: 7519a45d9c5d74b170653b2b6f9901919f39e6bbabbcf42e762923e45e927ea5
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://bologen.ru/123?utm_term=what+defines+a+gimp+suit PDF link annotation
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/327806.pdfIn PDF document text
    • http://erkutungotu.com/server_2016_remote_desktop_services_manager_missingukuy4.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/zuwulatuwuba_xonemepufozibo_wovajoxaropesu_vusojuxazunitur.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/53203bb.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/8677841.pdfIn PDF document text
    • https://xolufoxe.weebly.com/uploads/1/3/4/5/134501271/dede23.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/wukiruwesaperudoreti.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/4th_grade_science_worksheets_on_plants.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464735/normal_5ff7a0a4591f1.pdfIn PDF document text
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/9933596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_602167d1c31c8.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/literature_reader_class_8l1gkw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_6011e4a39ab73.pdfIn PDF document text
    • https://pasoxogul.weebly.com/uploads/1/3/5/3/135399766/rixegaxorej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nefigubisi.epizy.com/centrestack_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/24952036025.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/yookoso_workbook_answers_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/manslaughter_sentencing_guidelines_2018.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_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5340 bytes
SHA-256: 523120a17b540a898f92fe2e3d9d3b0e7970516dbba7d93b71ec02d1a9b5e53b
font_01_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 11320 bytes
SHA-256: 72ee46c8072a7dafdb0a9363bc6b4a813d92ac43f8d67d220c392d41c8de6a16

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