Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1654306a7e6688…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 11:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f8d688e281ef4b35cc2b8c8b05e2ef1 SHA-1: 253db76e9135abadf26405f10c1654e2b5112858 SHA-256: 4c1654306a7e668824af8cc389841e348932539bdd47008e25799ccd90e3fb2f
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xezojetit.ru/wix?keyword=1491+pdf+free+download PDF link annotation
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/kodewisujeri.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/chdtjb4/70329291121.pdfIn PDF document text
    • http://kyukty68.xyz/84848971435rw4d7.pdfIn PDF document text
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/f680bf9424ad6.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/9753481.pdfIn PDF document text
    • http://edarudost.online/lesson_plan_ideas_for_infants_and_toddlersrs507.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/aahhgdL/enyo_pro_stationary_bike.pdfIn PDF document text
    • https://mibimosa.weebly.com/uploads/1/3/5/9/135959727/ed4c0fdb2a196e6.pdfIn PDF document text
    • http://fbcopyright-center.com/80399596085o6kxc.pdfIn PDF document text
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/tivipi.pdfIn PDF document text
    • http://forpost-electrica.ru/sazofuzarizaxaaej.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/8d3aa41.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/303249.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/nosepevozux/green_energy_powerpoint_template_free.pdfIn PDF document text
    • http://welidigukiru.epizy.com/80990280047.pdfIn PDF document text
    • http://xozujojunesu.epizy.com/daxubipiwififojoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/project_milestone_dashboard_template_excel.pdfIn PDF document text
    • http://pagovogezafub.rf.gd/difference_between_garmin_vivo_3_and_4.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/lovely_accident_full_movie.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_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 5148 bytes
SHA-256: a7aa727c9599c2afdbb8e1e04983a348cf2245947b47a82751cedb6d2b94ed95
font_01_sfnt_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 10184 bytes
SHA-256: eb8c664cfd2b2b8a1806734cc98df80e3d8b8e1722d0bb25921ea971edd80c2b