Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43b17ec3ba57864…

MALICIOUS

PDF

40.9 KB Created: 2020-10-01 19:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bd3667f62fe197286ed8162edd8250e1 SHA-1: 7a9faf4ad4568175e5448cdbb992ad4892a89b7a SHA-256: c43b17ec3ba57864a177845a4f2ab1db739a65a21556924cd1d2d526da2fe868
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=pdf+image+text+editor+online In PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/senitemezogidobimalopo.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/85830655693.pdfIn PDF document text
    • http://samawebe.thefocusprinciple.com/uploads/1/3/1/0/131070867/bubazamitugimu_noratutit.pdfIn PDF document text
    • http://dilizo.beegladefarm.com/uploads/1/3/1/3/131378814/4003777.pdfIn PDF document text
    • http://moruv.westech-rides.com/uploads/1/3/1/4/131437622/nusaziku.pdfIn PDF document text
    • http://files.barringtonboosters.org/uploads/1/3/0/8/130814296/pitadawa.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/jodokeragug.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/nivazopojosasujozigofumi.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/ginajajij.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/sipexi.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/ec3e0459-9807-4d55-aa85-d67d2a3efaa9/56591031072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2f980a-7939-4864-8f45-e9465192bf03/butosevumizizesafege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d5598f-46df-457f-a2c3-4b8d58deb5e6/wopolijakemuloditi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90417b79-1013-42e1-b4f2-fc41d9af1e03/wikupepivorepewadogex.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_off00006290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 5120 bytes
SHA-256: a7778415e95ce3a9515dc380ffa1a9544d7c32b7ab8c19a1ece44c6c68c14e08
font_01_sfnt_off000073ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 10276 bytes
SHA-256: 7386ee166c9a206b00850eebf5ae9df41a3817aeb0831043d2e6ea6d5f515046

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