Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea772066d6e6fac8…

MALICIOUS

PDF

66.5 KB Created: 2021-02-15 04:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0ba50f518bd1181263af9c6e4a37d913 SHA-1: d3ca0dd7d7d2016b617d3d82cea0d3c914310a41 SHA-256: ea772066d6e6fac84d35ee255b0d733ccef288fc6eb6fcbd8183e0699e8f9888
244 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
  • 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 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.
  • 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/123?utm_term=extreme+weather+worksheet+ks1 In PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/muwabuxipibi.pdfIn PDF document text
    • https://ginuzakonufa.weebly.com/uploads/1/3/2/6/132681862/7e9f884827205.pdfIn PDF document text
    • http://educationonline.website/research_proposal_on_air_pollutionvdchc.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/e1d4debfd3b57.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/jewulutuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jeiaPu2/setobixibadajigesagi.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/565799.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/03iigiV/patujavisapedin.pdfIn PDF document text
    • http://bestsaleshopin.xyz/46370273633kj6lu.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/xujuras.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/BKOhjFl/20735005423.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/63388.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/4379254.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/suwemojexamoto_gigume_wapase.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/iKOgfhc/27987225489.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/b7e0e8ab8.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/siwilinap_vabawoluv_zibudatuzidejet.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/sojuravewi/pasos_perdidos_alejo_carpentier.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_off0000c882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC882 5124 bytes
SHA-256: f48201485458408d98aefbb710f1a2b748dec4759658f6ae7e2da4d38969c4cd
font_01_sfnt_off0000d9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DB 10364 bytes
SHA-256: f39c100228c0c96796fbd7e1adf2fa5ee6c5b616e061a680c3c4ddd597026395

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