Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a21c9bb4fc2da1…

MALICIOUS

PDF

77.5 KB Created: 2021-06-01 02:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1210d57231ebbe802046466335f19ef8 SHA-1: 9bafce10da7d43893e1039d5e3c7cc186ff3fb4f SHA-256: 61a21c9bb4fc2da1f2733930ff1d3482fecf9bf627e63b9c12c7b914e7e51f98
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://catamma.ru/pbw?utm_term=photoimpact+pro+13+free+download+full+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469847/normal_605d16f61f3fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456140/normal_5fcfa3d196531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojifot.pbworks.com/f/49219219142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e277f76-a337-4f4e-8419-fd275d98032f/finding_interior_and_exterior_angles_of_a_triangle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba08110-45ff-4883-9b57-6623d3d84ac0/why_gas_stove_spark_igniter_not_working.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/deb_to_ipa_file_converter_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9b8958-da23-4cbe-937f-a21976b06348/bikivo.pdfIn PDF document text
    • http://venatulafiz.pbworks.com/w/file/fetch/144424830/81467384725.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/exercises_for_sacroiliac_joint_pain_uk.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144419790/satesikivilelabusaliru.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144419124/zogiborotigapafosa.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/13327815952.pdfIn PDF document text
    • http://zufumegi.pbworks.com/f/vygotsky_theory_of_cognitive_development.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144435807/jikige.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144420207/najemitokopakaxizogej.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/aaron_berkowitz_clinical_pathophysiology_made_ridiculously_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a33c7f2-df56-4cf9-8375-603c41f978f1/monusurax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f71d186-8fcd-4652-9500-1eb2f9d195f9/65691911914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7ad882-287e-4178-8c23-52131add18a2/80317490284.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144429117/installer_car_parking_4.5.0_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ec21b1-d50b-41d6-a510-00d569e25601/does_simon_die_in_shadowhunters_season_1.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144428862/how_to_play_dinosaur_game_on_chromebook.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144421761/9396918819.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_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 5764 bytes
SHA-256: 8b0d5611dea3b7319dd68858078a79bc081d7641a16358b02c0a91ccdfa8a0e5
font_01_sfnt_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 11796 bytes
SHA-256: a64320e43b861db7c3e232015c64e38ce967b6cf55537693a7e658647ba3652e

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