Malicious PDF — malware analysis report

Static analysis result for SHA-256 820971e592bda04c…

MALICIOUS

PDF

45.3 KB Created: 2020-11-09 02:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 58b08b78198bbda806864e06af0ebd33 SHA-1: 55681be55ff2a0e4f61f9663b3453ea7ae61e7cd SHA-256: 820971e592bda04c19d799a1c205b01a4b0f7f268e88e149d51eeac444bce9d6
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?keyword=veritext+court+reporter PDF link annotation
    • https://dikosunasalimob.weebly.com/uploads/1/3/4/3/134363034/supinow_vazokawejig_jutararuw_bivotimupev.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/9698555.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/5032668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_5f92ca782dd4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/levonirupipador.pdfIn PDF document text
    • https://gozodusi.files.wordpress.com/2020/11/pipasogasepepudutamigopob.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ea930d-5ae0-489f-9965-776dd2d411fc/vimonenesufevirovobuzito.pdfIn PDF document text
    • https://zikivep.files.wordpress.com/2020/11/sapimovezekisoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2514f6c4-7a6e-482a-894c-b820c458c556/vuxisov.pdfIn PDF document text
    • https://fajutavezuku.files.wordpress.com/2020/11/christmas_piano_fake_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6a4e1e-b281-49eb-80ab-256fd2de7a7e/mq_interview_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2881f433-d42f-4dae-a0a2-64d0293dc7ef/vivelobebuneged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8544c22b-905b-4e01-b220-ae6cf4c347ce/fire_emblem_inheritance_of_ash_downl.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_off000077e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E8 4540 bytes
SHA-256: 6b9e7d24a7418a188913e671e1397017691a486ad991cc488b6e0bb18498fa3a
font_01_sfnt_off00008779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 9732 bytes
SHA-256: fa9c6739aa2548dd85da9b637b3f9b374841a0263593cf853561b7cec149e295