Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46cb971f26925df…

MALICIOUS

PDF

78.3 KB Created: 2021-06-01 03:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a7998381f30736533f5271a21ad4101 SHA-1: f3b9fd8a911cac6be03abd790c451b0c1674ddd1 SHA-256: b46cb971f26925df15b4be381e2982ab804997cdfd144166a5d6445f31ce3bb2
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, crewmak.ru. This domain is likely used to host malicious content or phishing pages. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed as a link farm to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/pbw?utm_term=are+hollister+hoodies+good PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490274/normal_600e764bee696.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4375088/normal_60b575d4b6c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_605aad0d11725.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/ebb3d986-fdf1-43d6-a125-2968c47f5bfb/whirlpool_water_cooler_reset.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144428571/16154809140.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/46763966489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1447bd2f-fe97-46cd-9c7b-32af6aab05da/how_to_reset_kiinde_bottle_warmer.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144431508/61474875353.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/warhammer_codex_vk.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144425640/seiko_sportura_instruction_manual.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/lilutixazavasikope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/593f0992-e810-4f22-b0f5-ade8e9b64432/dell_optiplex_gx280_drivers_for_windows_xp_32_bit.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144436482/43715869180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9db3c8c-37b4-495c-8a3f-4d4237347e3a/review_breville_smart_oven_air.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413715/66302139558.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/10221419400.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/50493482842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4726e0-3f23-478f-8a37-9edfee82a267/givoxudenolal.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/daily_employee_attendance_sheet_in_excel.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_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 4868 bytes
SHA-256: 1ca06615a73b48cdbe2ec8aef747162bc556c48621d666afee5fabaaa276cf45
font_01_sfnt_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 11300 bytes
SHA-256: 4fceb968dc1430b1da898aa401072aa285824f21ab835ca45cafd7e363267bfa

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