Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fafc60b6d8474f…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 03:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8dd5e1095b4ef0d5a36095bbca43d8b6 SHA-1: 0eebcdbaf211971a23e59cc956b984eb30ea6253 SHA-256: d1fafc60b6d8474f43f932b29a8c57d5a198360c05e8cf950c8af95a2c7da120
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gimoguvi.ru/award?keyword=fraud+examiners+investigators+and+analysts+salary PDF link annotation
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/5442026.pdfIn PDF document text
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/8df23ebaba8242.pdfIn PDF document text
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/wemajetidepo.pdfIn PDF document text
    • https://mavukaral.weebly.com/uploads/1/3/4/9/134904766/6578613.pdfIn PDF document text
    • https://cdn.sqhk.co/zewawugawa/rVxidgj/five_nights_at_scary_teacher.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/gibara.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/icggGOy/879555601.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/mifukobiveribofu.pdfIn PDF document text
    • https://metoxuxiduwano.weebly.com/uploads/1/3/1/6/131636764/1708709.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/266447.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/W9bJ5hz/yellow_line_road_sign_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bugutaj/canada_passport_photo_size_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/google_chrome_for_redhat_linux.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_off0000de1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1D 5332 bytes
SHA-256: cd41452300ddfb79fb56bb06aaea11c7fbb09bc15f6c68849928ec0509b72eca
font_01_sfnt_off0000f037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF037 10568 bytes
SHA-256: b71de481304a15f298f75dd9142c381c157f74f352c954ce963e6b4c5a3ca90a