Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7128ee99d3d0ad9…

MALICIOUS

PDF

72.1 KB Created: 2021-02-20 11:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c830828db98b1bf641039e1c0192b51d SHA-1: 8abc3af4b091665fcf32c041f63f3cf1ef5c1e12 SHA-256: b7128ee99d3d0ad9ec5024c85c2677a333a099030d3f3212ab0410d850fb6c65
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=you+have+brains+in+your+head+poem PDF link annotation
    • https://lelunoforonu.weebly.com/uploads/1/3/1/6/131606056/rinovutini_bilimilu_xurabubalam_nesudunopizi.pdfIn PDF document text
    • http://astrology-personal.online/genujukaxarogus5dv.pdfIn PDF document text
    • http://fullhp.info/sections_in_latex_reportmtrtk.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/winogugotas_gozijetosu_kijemavirufi.pdfIn PDF document text
    • http://rameautbxy.space/wewakafvb90.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/4711195.pdfIn PDF document text
    • http://reassurez-moi-fr.info/70718027899jnbw8.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/aha_2018_lipid_guidelines_ppt.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/kirejovibofenupefami.pdfIn PDF document text
    • http://sweetygirl.club/problemas_optimizacion_selectividad_ccss6rn4z.pdfIn PDF document text
    • https://zelosadu.weebly.com/uploads/1/3/1/3/131379518/didufegizisexaro.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/manualidades_con_cd_reciclados_paso_a_pasopf8fl.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/zobejixi.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/xekipunuviw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafudunafow.epizy.com/autodesk_student_navisworks.pdfIn PDF document text
    • http://koburolamugalo.rf.gd/4_pics_1_word_level_2670.pdfIn PDF document text
    • http://lagixilutami.rf.gd/32316635729.pdfIn PDF document text
    • http://momugegunimex.rf.gd/belmont_school_durham_uniform.pdfIn PDF document text
    • http://potutanevoje.epizy.com/66793247298.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_off0000dd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 5432 bytes
SHA-256: da991bbba0e2568c979cd6fb0d60a723909f3ba366ffca7f84ad30f9e8339943
font_01_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 10316 bytes
SHA-256: 52495630332ba5c5d35ba12108f379151460ea5456c5a5622b75620d84c0ca12