Malicious PDF — malware analysis report

Static analysis result for SHA-256 8474b37a7f2160da…

MALICIOUS

PDF

42.6 KB Created: 2020-10-03 07:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1353bd479b7dbc58e3743c9b43b8cf99 SHA-1: a517ac09c44cd3bada035eb555ed0f9fb2aa6829 SHA-256: 8474b37a7f2160da41ec318381b76a37b7b2b5d0fa2cb0cdf4441039966726fc
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=la+ilustracion+y+el+enciclopedismo In PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/pezebemesafevulutimeko.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/dotefixuvivukivapem.pdfIn PDF document text
    • http://gidejito.zippysinc.com/uploads/1/3/1/4/131437867/lofavonuvegukexepow.pdfIn PDF document text
    • http://fonovot.wickercave.net/uploads/1/3/1/4/131409090/9472845.pdfIn PDF document text
    • http://lafizuda.teamsoho.org/uploads/1/3/1/4/131407481/d6b3875aeeea.pdfIn PDF document text
    • http://files.jmocapital.com/uploads/1/3/2/7/132741475/8251953.pdfIn PDF document text
    • http://files.lakenokomispc.org/uploads/1/3/1/6/131607019/vadiseviwodokoke.pdfIn PDF document text
    • http://petolarod.harborcounselingpc.com/uploads/1/3/2/3/132303282/74295799f9eb8.pdfIn PDF document text
    • http://files.bhavanavaishnavi.com/uploads/1/3/1/6/131637147/nitav.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/1/0463/1396/3677/files/hewes_middle_school_bell_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3540/1633/files/firefox_export_cookies_to_txt_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9289/6663/files/84089759791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8445/4811/files/83910371757.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_off000067b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 5260 bytes
SHA-256: 1dd317eaaae000c84926db342d27e893fdc5e69939cebab4dc602b05a5a40699
font_01_sfnt_off00007990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 10684 bytes
SHA-256: 3027ca7f6b7cb40077b8709fe0423f4e48ffffdc350e10db2af8c8fe1360c2e2