Malicious PDF — malware analysis report

Static analysis result for SHA-256 b298bef905752005…

MALICIOUS

PDF

45.1 KB Created: 2020-10-04 06:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 70add76f55efebd769c763c1707d009f SHA-1: 37f4cb9a4f611699f4941db0a5094d14921ff222 SHA-256: b298bef9057520050fbac894c7246e3de669f74222b480ab76ec321f9715854a
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/strik?keyword=deviser+db+meter+ds1173+user+manual In PDF document text
    • https://site-1039795.mozfiles.com/files/1039795/fuwevivuwajisixa.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/40113439733.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/wivod.pdfIn PDF document text
    • http://xogulo.clevelandschoolsfa.co.uk/uploads/1/3/1/4/131482975/ccabba0ea.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/36373040421.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/24069555944.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/74616308492.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/37357114090.pdfIn PDF document text
    • http://pilozot.divinewordseminary-riverside.com/uploads/1/3/1/8/131871721/jaxibepabajupe.pdfIn PDF document text
    • http://faselopa.megaplot.org/uploads/1/3/0/8/130874134/lemijinuku.pdfIn PDF document text
    • http://bivotot.amymaddoxphotography.com/uploads/1/3/1/4/131453336/6750239.pdfIn PDF document text
    • http://domax.thomasjcapobianco.com/uploads/1/3/0/7/130739415/de985957.pdfIn PDF document text
    • http://modutik.lansdownepto.org/uploads/1/3/1/8/131856554/gesamesekifami-zupawosiwinefo-narobafuka-lujet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000071e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E9 5464 bytes
SHA-256: d548492a95f63de85bff881847a3ea047b3b8cf493d255961efdbc427b9fdddf
font_01_sfnt_off00008477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 10304 bytes
SHA-256: 369370e952745c5da41c0cd0ca0b8120af390d4f61dd92764d2ba27b94829ab0

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