Malicious PDF — malware analysis report

Static analysis result for SHA-256 4662058b5b8cd013…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 20:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e2d77b44a1bfc0663896048462b64e3 SHA-1: 3a18db45428669d9f2db1807c4f652f965677207 SHA-256: 4662058b5b8cd013e06856efc286c4361860b23d593b1d493085e4b6534942d2
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file that contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads. The presence of external URIs and the link farm heuristic indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=box+social+menu PDF link annotation
    • http://the-job.ru/fuwitoponidivudefujedeme0k946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_6032e40a89f90.pdfIn PDF document text
    • http://cabinetshub.xyz/899788085883khl4.pdfIn PDF document text
    • http://copyrightshelpcenter.com/fajusexxt3c.pdfIn PDF document text
    • http://ylyn.ru/jowurosul8snv.pdfIn PDF document text
    • http://idealslimitaly-official.site/51080203350c0b7m.pdfIn PDF document text
    • http://lishop.site/how_to_write_a_personal_narrative_grade_5qqcip.pdfIn PDF document text
    • http://regse.website/performance_appraisal_system_for_teachers_blank_formdxpyl.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/frayer_model_template20ihx.pdfIn PDF document text
    • http://belldiscount.ru/dwi_nhtsa_manualumhy8.pdfIn PDF document text
    • http://mifvideo.space/big_moe_s_diner_menuc9dyo.pdfIn PDF document text
    • http://creamwalls.online/fuxineditufomabusovatasyvehn.pdfIn PDF document text
    • http://price-list.moscow/big_arms_workout_routine74wtf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_6004d8b6e24d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzasapexuwuju.epizy.com/worksheet_on_isosceles_and_equilateral_triangles.pdfIn PDF document text
    • http://jidoreno.epizy.com/android_phone_games_website.pdfIn PDF document text
    • http://zifemibenuf.epizy.com/teacher_s_guide_grade_11_philosophy.pdfIn PDF document text
    • http://zaposupi.epizy.com/worujeziw.pdfIn PDF document text
    • http://memagom.epizy.com/nutrition_care_process_monitoring_and_evaluation_examples.pdfIn PDF document text
    • http://leximadibiwojid.epizy.com/sundance_spa_parts_uk.pdfIn PDF document text
    • http://kisuneronebel.rf.gd/32788075238.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 4968 bytes
SHA-256: 523bed0ebe113f263b44159bcefde3c6ce77feddfef69672da7056b3ad5cd57a
font_01_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 10516 bytes
SHA-256: 45fa406dac5d935bd33a95b7aac5a703678b1630160dbcaa3991974592e4b8c0

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