Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33769f5d851d8f3…

MALICIOUS

PDF

63.3 KB Created: 2020-11-07 18:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 258ab73f40265f8d3d55fedd0040952e SHA-1: 133c5087295327d4fbe435a36972ac73f081a7f6 SHA-256: e33769f5d851d8f3a688d96ea300da13931dce4d94cdbedd89efec2827f21768
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://trafffi.ru/123?keyword=map+of+the+roman+forum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5fa1c5038e169.pdfIn PDF document text
    • https://rinalodejivew.weebly.com/uploads/1/3/4/3/134383373/ad20faab.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/2a43ae874f117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f9690b02f08e.pdfIn PDF document text
    • https://vudizexifaret.weebly.com/uploads/1/3/4/3/134314381/3559436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5f9d76487622b.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/1564899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://worutofufun.files.wordpress.com/2020/11/ritiluboliwo.pdfIn PDF document text
    • https://jatanoteje.files.wordpress.com/2020/11/reforma_protestante_calvinista_resumo.pdfIn PDF document text
    • https://mujejikep.files.wordpress.com/2020/11/beroduw.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/tivavonupuwem.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_off0000b828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB828 4936 bytes
SHA-256: 6403888d045855b86ca1076da77578635631072ec99464671b9f0c286fb0e8ab
font_01_sfnt_off0000c8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DA 11916 bytes
SHA-256: 7d3b72de3f700d4b34de56c63b74c6eb0ea1be60b883eb02290956654dc0bd6b