Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ebb458fa7c9b5a…

MALICIOUS

PDF

71.4 KB Created: 2021-06-08 00:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c31301d6d920442e54483080659e14cf SHA-1: 3f331bbc51c777a89132811b27b131e81835489e SHA-256: 80ebb458fa7c9b5a594b3b3fc5835b1dddf1ac5dc822b7809ee477fad306bc0b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous external URIs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to obtaining a certificate, which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/pbw?utm_term=how+to+get+unmarried+certificate+in+bangladesh PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4369907/normal_60b0050db3a72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5fe01b9901a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_602d675eb8b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_601f21c63ff1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_60674ef808c91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fe2b9eed7786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_6014f4cbec7c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144643110/how_to_look_up_accident_report_by_case_number.pdfIn PDF document text
    • http://bolejagum.pbworks.com/w/file/fetch/144650565/67118025842.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/fahrettin_razi_tefsir_oku.pdfIn PDF document text
    • http://naxenuve.pbworks.com/f/how_to_determine_npt_national_pipe_thread_size.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/47326794481.pdfIn PDF document text
    • http://lukipuj.pbworks.com/w/file/fetch/144659865/whatsapp__samsung_5230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152b4a43-b197-4aa4-9b0f-e9f42dddac8f/kurejeximaxunoxigofosu.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144412797/logic_pro_x_trial_mac.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/w/file/fetch/144456795/johnson_county_kansas_vehicle_registration_cost.pdfIn PDF document text
    • http://sakulibur.pbworks.com/f/28166574279.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144517374/kitudopowali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0b041c-de7f-42d2-8c91-53e06be5c27d/what_is_the_best_rated_denture_adhesive.pdfIn PDF document text
    • http://muxapoxowo.pbworks.com/w/file/fetch/144646176/kpss_tarih_soru_bankas_2020_yandex.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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 5628 bytes
SHA-256: 17d0ea233b184aecd055921b2ef8954d407b71fe0749087e510f7ceaec3470cd
font_01_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 12156 bytes
SHA-256: 5f07996c002d39747e2db8089cce8415c629617654d5ac7918e95e00d9a5831e

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