Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e75e5180203751d…

MALICIOUS

PDF

55.8 KB Created: 2021-09-16 12:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1893b38f3a9946089cc601ef53b259d4 SHA-1: a2f139c75ed44e16f445a1b695052541da400f6c SHA-256: 4e75e5180203751d2b28c78d446530ee7351d83234acaa2175fd72351e6e64d3
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The presence of embedded JavaScript suggests an attempt to execute code, likely to facilitate redirection or further payload delivery. The overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3186

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://irlanc.ru/uplcv?utm_term=top+jeux+android+tablette PDF link annotation
    • http://gruaszarate.com/ckfinder/userfiles/files/busanalavakasu.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/dakitelilikori.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/27989992195.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/5380568631.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/varizixotulubipoka.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1915913021613bf72fb233d.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/95762789839.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/28855983966.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/72152663553.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/lipedateparo.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/20854369681.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/30223841415.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/nozaxitexavamubobaboj.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/tubejepiwo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613740b4923ce---92735130318.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/sabopego.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/jotekim.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/tuiv8qgtqatluhsnbmurgooge0/dibavopakadudavetozazov.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/xinezanawujom.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/75407271019.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/pibesumagexofug.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/zusedofuwijobukidorivagu.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/65376505327.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67550728863.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/jofedajoj.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161306638f0a54---50119588390.pdfIn PDF document text

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