Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d92655bb5c7ff81…

MALICIOUS

PDF

64.2 KB Created: 2021-02-24 13:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fb8b7ecf4c991067f6edae5f36fd91c8 SHA-1: e2ad6b2574ebc49655c6c68f9af069e90d0c85f8 SHA-256: 4d92655bb5c7ff8184e4715b8f643394701bff1611d8d74be147869e0430f13c
244 Risk Score

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
  • 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 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.
  • 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/wix?keyword=edc+2020+orlando In PDF document text
    • https://cdn.sqhk.co/lebudawojafi/EMkOJji/napoleon_dynamite_my_lips_hurt_real_bad_youtube.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/17e7969585b1aa9.pdfIn PDF document text
    • https://telusexuv.weebly.com/uploads/1/3/0/7/130776200/nimaluw_rubaxatep.pdfIn PDF document text
    • http://sputnews.com/coursera_r_programming_week_1_quiz_answersvxehw.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/ghghahf/booyah_covert_spinnerbait_review.pdfIn PDF document text
    • http://danivufulof.iblogger.org/32435156849.pdfIn PDF document text
    • http://sale20.site/kuxegagsjivp.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/rivomadofag.pdfIn PDF document text
    • https://dajetulanew.weebly.com/uploads/1/3/4/3/134309067/lilula.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibowaxus/ihLjjhe/traffic_run_no_ads_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/ihAwdoQ/spin_the_wheel_quiz_maker.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/komubidujejilosuf.pdfIn PDF document text
    • http://boviriso.22web.org/cockcroft_report_paragraph_243.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/d3fa85321a750f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visejatuvun.rf.gd/nulokapefuxux.pdfIn PDF document text
    • http://sedabil.epizy.com/beagle_movie_songs_masstamilan.pdfIn PDF document text
    • http://nemebikox.epizy.com/diwokalaxo.pdfIn PDF document text
    • http://rilevoka.rf.gd/zewazotabali.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_off0000c15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15F 4984 bytes
SHA-256: fdedb59f17ac11129811740636dd166b1a8252d579f10dc474bfbf61c41af82b
font_01_sfnt_off0000d25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25E 9908 bytes
SHA-256: 9326611550bfa121920afeafb94379e92903229b4ddd438397c3aad19980eae7

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