Malicious PDF — malware analysis report

Static analysis result for SHA-256 6203c48f007bb9b5…

MALICIOUS

PDF

41.2 KB Created: 2020-10-04 19:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ff08c4cf244e61daa5428eede0b4be6b SHA-1: e7929dd4b357361d9b927ad7aa0a88dd3694f462 SHA-256: 6203c48f007bb9b569d89ac81ea336a56813bcd29cfd8f4f8de05a4866b5e283
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=pronunciation+workshop+training+manual+pdf In PDF document text
    • http://jawidet.mainstylebroomfield.com/uploads/1/3/0/9/130969060/xexepixorux.pdfIn PDF document text
    • http://medov.matthewfichera.com/uploads/1/3/2/6/132695746/2172889.pdfIn PDF document text
    • http://files.pennsburydrama.com/uploads/1/3/0/7/130739084/5688745.pdfIn PDF document text
    • http://juwaga.nobullshitacademy.com/uploads/1/3/0/7/130776428/0a7fbce.pdfIn PDF document text
    • https://site-1040346.mozfiles.com/files/1040346/11765253543.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/juvesono.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/38439656507.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/36045479800.pdfIn PDF document text
    • https://site-1038691.mozfiles.com/files/1038691/jajunapirovovoj.pdfIn PDF document text
    • https://site-1038453.mozfiles.com/files/1038453/lovubegomeze.pdfIn PDF document text
    • https://site-1039316.mozfiles.com/files/1039316/jonabede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2123ccda-8b64-467d-98a4-c202bd6e076e/nixiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629c77d1-2946-4e68-8e9b-4c33ee7303c3/41083838931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95a76ae-ddf5-436e-bff3-df0b328d56cb/vonarewefenudomopudobuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04392009-8818-42dd-8a50-56f4590bac95/sezuxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1caa91b3-926a-48af-a0fb-b5a26a55f779/24724674821.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_off000062e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 5724 bytes
SHA-256: 89dee0556dca0ed5dfd109a80d4b890cc6d0e08cdeff8569fd4a75de03ab9ea8
font_01_sfnt_off0000764a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 9884 bytes
SHA-256: eb5fe00fd2a178f68686a90b316ed4940f4b96fde334e5aa0a98c31e60c17eb6

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