Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f473cf2a09b796…

MALICIOUS

PDF

75.6 KB Created: 2021-02-28 14:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 39046ed439701e997bf2982c751388a4 SHA-1: e0791d95f3af172b6015f3fb469f830eea29c3e5 SHA-256: 50f473cf2a09b796a729e8e8f573620cd7830c0157acf7c1fc3690e313df3dfc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://yafferge.ru/award?keyword=how+would+you+describe+leaves In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481270/normal_6008b8cf3ff12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fc9f9a7ddfa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459785/normal_60040d330a565.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/pL4xaja/jaxamovo.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/ifd68id/dazor.pdfIn PDF document text
    • http://befigter.xyz/drudge_report_mobile_sitepx9fe.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/IITHicm/diffuse_joker_bombs_fortnite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fdad18255493.pdfIn PDF document text
    • http://ionatr.space/dizaxamokexisolikora0oqt.pdfIn PDF document text
    • http://timelessdecorum.com/reset_router_asus_rt-ac66ud5wm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazuvolixevafo.rf.gd/99564630514.pdfIn PDF document text
    • http://jefebewo.epizy.com/archicad_20_mac.pdfIn PDF document text
    • http://raronamivado.epizy.com/charity_and_andres_performances.pdfIn PDF document text
    • http://watenuzigoxabi.rf.gd/penoxuxevobijujaz.pdfIn PDF document text
    • http://kefujuvaw.epizy.com/react_native_modal_bottom_sheet.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_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 5288 bytes
SHA-256: 96b7e7ec665e5c03a9b9c12acad20c2cab9e64cabc952fc3e8ef2776c7c9738a
font_01_sfnt_off0000fbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC9 11052 bytes
SHA-256: 12e4eadbf51c56de035afdf10ba401c1faf1b9e3a4079167ad134395cdf215d9