Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbea53619e357b0…

MALICIOUS

PDF

82.9 KB Created: 2021-03-17 07:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: adadb4e352f495eadf8640d65a63fecd SHA-1: 6ef8ac38703a1dd3ff762beb1cea8d9b026a2083 SHA-256: 0dbea53619e357b03ba1ed3c6a717faf173be644d4c0bbab5b7d93934914fcdd
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading malware, likely disguised as a printer driver.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://xajibur.ru/strik?utm_term=brother+hl3170cdw+printer+driver PDF link annotation
    • http://fukiwurezopukof.mywebcommunity.org/muzorinamoxuwugevojezolu.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/dzzIcDF/1974975360.pdfIn PDF document text
    • http://steelsho3.club/72073006116jtbz0.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/tapogijako.pdfIn PDF document text
    • http://pusolaxunu.66ghz.com/irregular_menstrual_bleeding_treatment_nice_guidelines.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/74969650899.pdfIn PDF document text
    • http://mugedly.xyz/ludimejatodir45r0m.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/jiibUXE/google_drive_apk_for_kitkat.pdfIn PDF document text
    • http://checkmyscore.info/ibn_kathir_in_englishb5u5d.pdfIn PDF document text
    • https://cdn.sqhk.co/fifotadog/vTgjyib/krita_android_phone.pdfIn PDF document text
    • http://tesocoin.online/adobe_photoshop_elements_2020_tutorialsnyfn3.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/ciemGLb/pimurulojosum.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/kupudusasenuduboxanokazev.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/61716554635.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/idjeiit/tejil.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/biijbAc/fonuniwulenakif.pdfIn PDF document text
    • http://nurukemuwonudu.iblogger.org/57604402708.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/hTfj6hd/60528623296.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/ijjiNVP/best_earthquake_survival_tool.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/historias_biblicas_para_nios_de_2_a_3_aos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velosipu.epizy.com/brick_breaker_star_space_king_hack_apk.pdfIn PDF document text
    • http://veveliwuw.rf.gd/578245042.pdfIn PDF document text
    • http://zumebixakefeta.epizy.com/livezisuxufonepavo.pdfIn PDF document text
    • http://gefuwaw.atwebpages.com/sunereg.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/67881099556.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/westinghouse_timer_instructions_model_tm416.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_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 5412 bytes
SHA-256: d49b49ab825cc1fe69730d8252caad49ef35244bacbb6ac8bbeeae1ab4c67afd
font_01_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 10672 bytes
SHA-256: 3c4db09bff2da7fdcc047b6afced0f25df2a6433449520d4248e2f6f90102195

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