Malicious PDF — malware analysis report

Static analysis result for SHA-256 df28a9c61b4477b2…

MALICIOUS

PDF

72.4 KB Created: 2021-02-18 00:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d61c1c652ebf2e4034cdbce777b8939e SHA-1: 1e76f0480ddb72e542aad9f306ef253a2cae3072 SHA-256: df28a9c61b4477b2754c54f9deb4084359230d347c6d258396bbb700a8d55569
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=se+ha+perdido+el+pueblo+mexica+resumen In PDF document text
    • https://xuxoxipabixu.weebly.com/uploads/1/3/4/5/134588436/bididufatenaduf_tiwivuwivulow.pdfIn PDF document text
    • https://leponinidokawe.weebly.com/uploads/1/3/4/5/134502666/xaxabuximimozoda.pdfIn PDF document text
    • http://mexicotop.xyz/317389726307tjo3.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ijCWgcL/game_summoners_war.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/teziwumafo.pdfIn PDF document text
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/5620867.pdfIn PDF document text
    • https://solekavugixe.weebly.com/uploads/1/3/3/9/133999951/gaxekenowipo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463803/normal_5ffacbf5ca6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_600ff22125315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5fe961e26f57d.pdfIn PDF document text
    • http://naturaleone.space/88105140290uremp.pdfIn PDF document text
    • http://marketop.club/poser_hair_tutorialgcvqn.pdfIn PDF document text
    • http://espaceabonne.com/zirawumirixizunetuzuwbewjv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_60280cc7bd011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482418/normal_6015cbfa4c916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367273/normal_5ff108e496c4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404955/normal_5ff2de08c0b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5fd9489b90adf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 5624 bytes
SHA-256: f84437317029a3a009facc8c57f30bf5bf4e4dd0689b7b97e4a7f7dec6b883ec
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 11876 bytes
SHA-256: 7fa1c44651dbeaf1f289831b5b70d6623d2af99a1639c722551748a4156b9627