Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1cbc39d91ac221…

MALICIOUS

PDF

72.6 KB Created: 2021-02-17 14:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0a35a4f87df028ab0575bf4a68264e87 SHA-1: a726454f6f6a46fd94ea4ccff327013e196cf6eb SHA-256: 8b1cbc39d91ac2212010da09ad09f56f4a6ce218bb401c4cf3bd336672f25fad
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=schlage+be469nx+cen+716 PDF link annotation
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/5103423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_60033f0a7059a.pdfIn PDF document text
    • https://nikigefewava.weebly.com/uploads/1/3/0/7/130775032/rutegejopa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414868/normal_5fe1378b90d12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5feba88a3a023.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/dotorabizepemom-vodigofimezatig-vafir-nudip.pdfIn PDF document text
    • http://clubstore.pro/97795442651jdu9p.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/fRrxieY/sifubemikedota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_60192bdadbc69.pdfIn PDF document text
    • http://clipshd.design/4166824736843xad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_6004b32fbb121.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/gf6NIif/game_dev_tycoon_switch_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_6011f395ab6d9.pdfIn PDF document text
    • https://cdn.sqhk.co/bejazerorod/Yb4mlDo/waqt_the_race_against_time_movie_download_480p.pdfIn PDF document text
    • http://lady-bug.club/6420952197n5b7c.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/10hihjj/clash_of_clans_attack_strategy_th9_war.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/pride_lift_chair_serial_number_lookugsi8v.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/kovezux/26400537214.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_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 5628 bytes
SHA-256: 07d2f60d5f13cac4b3a99028ce70a2113866dba25eaa63e468503bcddb2560b5
font_01_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 12188 bytes
SHA-256: 343ea7177486b70fa2499822f22aaf69130e86d199a724c982a3a60e85750559

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