Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b33467b8c8b29e8…

MALICIOUS

PDF

73.2 KB Created: 2020-10-01 14:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 801c1407b753f40ef49c0d25c02206ff SHA-1: 33059eacb2bbfcfe5903b6fb6849334c988960c1 SHA-256: 0b33467b8c8b29e8dad1bdee417943858b29d4d6c3cdfaa9a6daa53f176b1247
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://gettraff.ru/strik?keyword=como+funciona+el+cerebro+humano+pdf In PDF document text
    • http://files.riverdaleridge.com/uploads/1/3/0/7/130775014/bbc42ec5a22.pdfIn PDF document text
    • http://files.jacdellaria.com/uploads/1/3/0/7/130738755/rubep.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/15095663761.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/mejipabomerilelo.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/nunovekum.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/24800767879.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/90897149005.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/f1cc1e50-e588-40ef-a26a-1d1c79d2b017/38242967166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16dadfa-706b-48b0-b0b4-f3966665d2c4/55092151425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9b37ae-f75a-4ce2-8a7f-e920a2f2256e/sipegiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5897e247-3f10-42cb-8f96-28f350564fcc/64630600786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c580ec4c-6752-4e2e-9538-eb95fa5c75d3/21000826989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef974e3-6f79-4885-ae1b-c8f34383afe7/13299390754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4faef74c-5d26-42ac-9a38-6cbd999f010e/67460517195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1a2b96-38bc-4cdd-83e1-ecd2d72d9c64/lujelemuxuluzajewikir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c297b6ce-29a1-4ca9-9744-7419afc2b877/zevowolepipidubog.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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 5260 bytes
SHA-256: d9930d1837f24693e35675c18e1103f076ab8bb9c193df9a11d6813a3af68e15
font_01_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 11672 bytes
SHA-256: d3f067daa16e1cf6d3ae6be4957c312f14ecf42528122b873852ba9fc8ae341c

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