Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28283577ec69fed…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 12:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fb6c7f21566d02094f371621bef9dfd SHA-1: 295ddfd9aac198a7603def7f69428451534cf22d SHA-256: b28283577ec69feda9f1027b8598c6e83f308786bb53fee66eedc8eec59f84e4
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=are+ionic+bonds+stronger+than+polar+covalent+bonds PDF link annotation
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/317191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_601d8c12a5067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426062/normal_5ff8881247285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_602a185fa1ed3.pdfIn PDF document text
    • https://xizulorojude.weebly.com/uploads/1/3/5/3/135391297/mavavexapupe-mufoxonelogesul-xovaparonuluk.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/eCF3WkB/tuwigusufubejip.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/wepusafewarit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fdbb6276b184.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/eIJa3YU/xerosexurilijanaduder.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414172/normal_5ffcf3a0c76ec.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/bhdgc6v/47298401487.pdfIn PDF document text
    • https://lulaxifijugom.weebly.com/uploads/1/3/0/7/130776747/divipukanutuzal_taxivogeralib_weradimokalig_muginefoxikak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387925/normal_5fde51dbf18f6.pdfIn PDF document text
    • https://cdn.sqhk.co/pojukitogex/bnbjboq/24853781074.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_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5524 bytes
SHA-256: 350171cbe6f47efda0670f580e9901845e408231aaaba4c1d00f3ed6c5981c8e
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 10552 bytes
SHA-256: b8a6b57c385c00149d4eb2a6fb99eca7dde623099f652abaec458be92e7a15a8