Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f34aaa40118f8e…

MALICIOUS

PDF

71.0 KB Created: 2021-02-28 17:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 022f5c23dcc0be88ff9f7ffa5488675b SHA-1: 4f21b8ae6b5d1691497653a656b9334b349b49fd SHA-256: f5f34aaa40118f8ee7cb057acd907a665aec7599e3014dd720f0c85842ddbb6f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=wauseon+ohio+school+district+number In PDF document text
    • https://dimalosuzilem.weebly.com/uploads/1/3/1/4/131452887/2695537.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/memento_mori_ring_poison.pdfIn PDF document text
    • http://zathkatow.xyz/drake_we_made_it_downloadc2qny.pdfIn PDF document text
    • http://girlita.space/caccia_al_tesoro_indovinellir73ps.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/finding_interest_rate_and_time_in_compound_interest_calculator.pdfIn PDF document text
    • http://braco.ru/pelicula_el_maquinista_online_espaol_latino3274n.pdfIn PDF document text
    • http://sellforce.ru/16072656448zm59p.pdfIn PDF document text
    • http://dompodklyuch.com/free_website_templates_for_education_consultantsgrrpc.pdfIn PDF document text
    • https://zoxexakaxikat.weebly.com/uploads/1/3/0/7/130739387/pezaganofojuko.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/crXRhdz/nubifejaru.pdfIn PDF document text
    • https://dabamupusoga.weebly.com/uploads/1/3/4/2/134265366/4622283.pdfIn PDF document text
    • https://zivozisexime.weebly.com/uploads/1/3/2/8/132814465/divizakajigil-rufomu-simerojusogawe-bepolewelisula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogimak.rf.gd/nujabini.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_off0000d93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93D 5332 bytes
SHA-256: ab5652751ac513d9d54767df451dff318e6e73000a38a91da1484d48eb31f2bb
font_01_sfnt_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 10564 bytes
SHA-256: bbb6af1223a9cda5af759c5121aad95548e8a1f872d8422a8d72c802564971a9