Malicious PDF — malware analysis report

Static analysis result for SHA-256 0901b2046374a0d2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 17:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 851d99fef349096504bd86cbd48e5d05 SHA-1: 4e84da27716e10cf05cba826ff57c93185f3e096 SHA-256: 0901b2046374a0d24186def08edab9dfd1ea13cfdc17261bb5178fdc4fcc081d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with a primary malicious URL identified as 'https://midufefew.ru/wix?keyword=zgirls+2+unlimited+diamonds+apk'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, suggesting a deceptive purpose. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://midufefew.ru/wix?keyword=zgirls+2+unlimited+diamonds+apk PDF link annotation
    • http://songkfrk.site/from_the_mixed_up_files_of_mrs_basil_chapter_4_summary1qqq6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fff5f14008e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_6049c4ef9013a.pdfIn PDF document text
    • http://freshka.fun/remizamosenobe3sf0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd6477b41822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_6006ea9513296.pdfIn PDF document text
    • http://triple-doska6.club/latex_cv_template_phd_studenttyi9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_6035af7093451.pdfIn PDF document text
    • http://saudiautoinsurance.com/kitonunima1ji4y.pdfIn PDF document text
    • http://citruss.space/41689005305cccz5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_602ee403a04e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48963ec7-25b1-4a79-828f-d9bbbed3ffdc/jiminibew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd712e2-0a40-4bef-8f45-b443bbb442fc/diary_of_a_wimpy_kid_2_read_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76b1955-e205-4b54-9218-3c513091f010/dizawodasimonefotazagafo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/lethal_fetal_akinesia_deformation_sequence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd0398f-9d54-478f-9ad8-2c7cc71c4f58/fortaleceos_en_el_seor.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/huawei_mate_20_android_10_update.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/tigagesuzokowulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f11fb13-a1ec-4d7f-bda6-3d503342719c/50484603687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59ab318-e0e4-49db-99b9-1c6be8375e91/abraham_lincoln_biography_kid_friendly.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/wirapiro.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/system_data_sqlite_dll_64_bit.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_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 5432 bytes
SHA-256: 1a56c7ec2eeae23c478cbbb4be9c042f6c55bb6b4863c1f0c59f2ce672c6ccb0
font_01_sfnt_off0000fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 10644 bytes
SHA-256: ddeacd40724183d6b24374649325a777f3d5036423c250629f5d306bc4723599

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