Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebcb50cef5d067…

MALICIOUS

PDF

71.9 KB Created: 2021-02-18 19:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f247fe91d59c0e9d538726dc53b1e1d1 SHA-1: 731f08b2317e71b2bf2a8051877fd06f88910a68 SHA-256: 85ebcb50cef5d067b4425e2aef8b3f20984f43f0061a2732b12dde73fdb51e2c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=ler+livros+em+ingles+no+kindle PDF link annotation
    • http://kanurapubefuxo.iblogger.org/gutebivasadisej.pdfIn PDF document text
    • http://tigesonepovar.66ghz.com/15789724105.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/iem4Bji/sniper_legend_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/ggebiaI/okay_boomer_girl_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/bgdUhih/99556085013.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/fgjXJjj/22511799613.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/mV8Wig8/totisolaleworixaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_6012658e9e84c.pdfIn PDF document text
    • http://cashbackk.site/84491429343wm324.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/gFEXgg2/immigration_and_nationality_act_of_1965_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/icE5LLk/84639458392.pdfIn PDF document text
    • http://tryse.xyz/13917199729e1qfh.pdfIn PDF document text
    • http://meetcabinets.xyz/3rd_grade_pssa_math_practice_worksheetstkuo7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5fe81822d5cf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimunofat.epizy.com/adjective_phrases_worksheet_with_answers.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_off0000de0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0C 5000 bytes
SHA-256: 4508117ccc377710f4eaec391633a6fe4880dfd74d49c45365ac0ea5a4638d6c
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10628 bytes
SHA-256: 9f7811397883e5789e7bb1b10923b1cdbccb1501c10f35fe7d88320de5bc997b