Malicious PDF — malware analysis report

Static analysis result for SHA-256 6760423044ef2e84…

MALICIOUS

PDF

43.2 KB Created: 2020-10-03 05:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e169bf3598f42295661dc330ee12f8fb SHA-1: 6376b3b3aed6d6059d505310635cf1bb05bcb8a2 SHA-256: 6760423044ef2e84db07fdb1f76211839f7f620bbc699074ce93bb462311eba3
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://cctraff.ru/strik?keyword=alimentos+transgenicos+desventajas+pdf In PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/75827215373.pdfIn PDF document text
    • https://site-1041857.mozfiles.com/files/1041857/jimakewukatixawuzeze.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/12806952854.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/vexisadetexerelij.pdfIn PDF document text
    • http://winev.themissingprincess.com/uploads/1/3/1/0/131070291/bivepabokapoji.pdfIn PDF document text
    • http://kibisu.littleempirepodcast.com/uploads/1/3/2/7/132740214/6c0054a9b969c7.pdfIn PDF document text
    • http://wobekuxex.cortkrekoullc.com/uploads/1/3/0/9/130969449/nadupe_fipixif_salitugafexoda.pdfIn PDF document text
    • http://files.cloth4everybum.org/uploads/1/3/0/7/130738720/fekilaxil_lekapuzum_mamotegijiti.pdfIn PDF document text
    • http://sovajejox.matthew-radford-davies.com/uploads/1/3/2/6/132681431/6961837.pdfIn PDF document text
    • http://files.davidburman.net/uploads/1/3/1/0/131071167/gubijifen.pdfIn PDF document text
    • http://relejesos.esolomonart.com/uploads/1/3/0/8/130874330/derer_jepofikerebeve.pdfIn PDF document text
    • http://ragigif.nauticalmediagroup.com/uploads/1/3/1/4/131454046/5b6c5b3088b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3607/6953/files/57194866367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5852/7394/files/malgudi_days_stories_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3378/3203/files/68133823221.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_off0000662a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 5600 bytes
SHA-256: d48601e1d48aa2b37275eda462d020a2373611807da51bb98814915bc8281813
font_01_sfnt_off0000792d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 11360 bytes
SHA-256: 59e29272a0de6cf80cd4cf32cb5d4b38f3bae46b84b262b0c2ce01a42bcf4331