Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae50d51550015303…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 07:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ca5b519dd9ed87fd200d6aa804fce3c2 SHA-1: 41388e2b84648a395dea31605b598fba18088e4e SHA-256: ae50d51550015303eefd14a67b1771ca5033c76bc5fb3c729e73c93066bf228f
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/aws?keyword=excel+binomial+distribution+calculator PDF link annotation
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/xorusebeziva-zumodogudi-razodakis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471099/normal_5fa609c911963.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/47383ed2a1.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/lewalagoresoxigar.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/5243211.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/gojununuje-mufajotibu-vizigajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fa876959144d.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/miniban.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/7225686.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ac3aefa8d5ca3b0.pdfIn PDF document text
    • https://vovufopoxin.weebly.com/uploads/1/3/4/4/134466437/pixafuka_garegutakujodo_nebexadunewefok_momusetalusuz.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/bepukuba/autofill_is_not_working_in_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/futagalimuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/h_and_m_age_requirement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0eaf9e-c7e9-419c-8847-3c43e180e3b9/63309190075.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_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5248 bytes
SHA-256: 7a595088027b611324efe451a01dce2459fe9215bea4aa8efb415c7ce4fa81ae
font_01_sfnt_off00007491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 11048 bytes
SHA-256: 41323f7e6958040ba874f38478471e7224c925c35fa00f953a65a26a29ae1d86