Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dafb908e51441fe…

MALICIOUS

PDF

87.8 KB Created: 2021-03-22 07:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9ea65ed6f57d66cb5138e7d7cefa3af SHA-1: 78ae58db96dd5f31538c05e8e97daa19c372280a SHA-256: 1dafb908e51441fea5f36b5ea347c449f4540dbf5e97dfdfd4738bc6e95a3bfb
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malicious redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=6th+grade+science+benchmark+practice+test+pdf PDF link annotation
    • http://testvvd.xyz/makonafuteruvhsfhh.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/fivaxizowi.pdfIn PDF document text
    • http://forsage.pw/data_analytics_using_python_book0tl2s.pdfIn PDF document text
    • https://furifusopuwebe.weebly.com/uploads/1/3/4/4/134471692/4b6dc30.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/segigilub-relumatuzukuj.pdfIn PDF document text
    • http://silver35.ru/niguwupudonosughnjsy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_601b1cf04a67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_6056da8be7c20.pdfIn PDF document text
    • https://xivilikowigonun.weebly.com/uploads/1/3/0/8/130813923/vaxub.pdfIn PDF document text
    • http://legiontry.online/aligarh_muslim_university_admission_form_11th_classvdsr2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_604ee98cb976c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_60226ec09bafd.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/xoruvavetif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5ff54536896e7.pdfIn PDF document text
    • https://danodukuwen.weebly.com/uploads/1/3/1/6/131637043/d21301.pdfIn PDF document text
    • http://energierecrute-emplois.com/electronica_y_servicio_automotrizxmelr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_6e86b1c1deed42e5a6b4a92f5dc9c07f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/sexedasuw.pdfIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_90b6b84b9c5e42aab9f7f56e0e5e57ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/data_structures_programming_interview_questions_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/5955915694.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/java_8_jdk_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/56891625940.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 5800 bytes
SHA-256: bdc2fce3f09ac152d8625fed42b8056375320625dd7ac3f8930681ddcb0375aa
font_02_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 12008 bytes
SHA-256: 9a4517141f2a7821ca922d2ee265bf8cbefec346b538e182ff6d697859b30ec2

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