Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b660c5008981a0…

MALICIOUS

PDF

83.1 KB Created: 2021-03-24 06:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e8bc1469f55e31ed9b8e9b6906e1721 SHA-1: b5eb070a7e60aef17d77ebad622480b6085239a5 SHA-256: 57b660c5008981a000c602bf49a7fae2d8dcb9ddab51d116398af28ad2f7f550
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=injection+blow+molding+machine+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_6053a6378c50f.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/fmzhdie/rounded_corner_trim_tool.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368952/normal_6007c9c75fe3a.pdfIn PDF document text
    • https://cdn.sqhk.co/jobebakegip/GjeKThg/bowling_western_suburbs_melbourne_map.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuloka/erfhhhg/lagupurusifelezigivabomi.pdfIn PDF document text
    • https://cdn.sqhk.co/nenoserod/AijgiaI/voxugono.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495973/normal_6006d92382791.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikatan.rf.gd/30793475335.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/photosynthesis_and_cellular_respiration_review_stations_answer_key.pdfIn PDF document text
    • http://ziritutu.epizy.com/90842892521.pdfIn PDF document text
    • http://pevudavef.rf.gd/34501277338.pdfIn PDF document text
    • http://sifebina.epizy.com/learn_arabic_alphabet.pdfIn PDF document text
    • http://webibufirug.rf.gd/zakukotuzavizepetopijas.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/dnd_5e_fighter_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/78065785982.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/kubernetes_step_by_step_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/zorukal.pdfIn PDF document text
    • http://sikejafomanama.epizy.com/r._t._o_full_form.pdfIn PDF document text
    • http://lutepebenunara.rf.gd/95522909207.pdfIn PDF document text
    • http://fezurerejexi.rf.gd/fulununijuxewe.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/64589030835.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 5540 bytes
SHA-256: 5448cc5fdce0131dbc94567e00271ca35737efab9f8ad63828103c77efcb5dd0
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10968 bytes
SHA-256: 2821240f46ee504eb6e6e7af1ffd78dfea0b0a8e446728bd29650c894279e66c
font_02_sfnt_off0001280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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