Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8cd338271d7c6b…

MALICIOUS

PDF

74.3 KB Created: 2021-02-26 00:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 2034ca7f4c3a5121e6b80424c80998de SHA-1: ba630eb3da0a5b5e75b08b4f876699e7db99a2f7 SHA-256: bc8cd338271d7c6bcf35433ab50424f9fac46087fcaff2bb7e073fbe0eb654b0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/award?keyword=petsafe+wireless+dog+fence+collar+battery In PDF document text
    • http://gnatural.space/hotaru_fujita_maiko_sheet_music0hgiu.pdfIn PDF document text
    • http://com-free-fire.com/world_market_dining_chairs_leathere4jo6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fefc308e8cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5fca2ce22b2ad.pdfIn PDF document text
    • http://nikaold.site/wanabenolojetew7c4b.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/ujjXegh/x-_ray_mod_for_minecraft_pe_mcpe.pdfIn PDF document text
    • http://nicechange.space/dungeons_and_dragons_5e_character_shigau3.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/82394348864.pdfIn PDF document text
    • http://vulgargirls.fun/musica_gratis_iphonekm3gq.pdfIn PDF document text
    • http://vovuzug.22web.org/admirvel_mundo_novo_docero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzixaludu.rf.gd/dewewukedugelolamuvuman.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/photosynthesis_lab_report_ap_bio.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/59455023817.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/kessebohmer_lemans_template.pdfIn PDF document text
    • http://pimurif.rf.gd/96975150865.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_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 5524 bytes
SHA-256: c70d72dff90c38d456a4ea75e359199d8704e88953afe712a33da8e3c93a32fc
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 15428 bytes
SHA-256: 5a8f41a8c6546b99756423c129369324046675ea053295a29ab808f49abd648f