Malicious PDF — malware analysis report

Static analysis result for SHA-256 5122b06d704d14bb…

MALICIOUS

PDF

58.1 KB Created: 2021-09-15 23:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6b7ec63e1baed73a08f037f98ff2048 SHA-1: e3db5061bfc7a2aae020398a6f496c33919131f5 SHA-256: 5122b06d704d14bb2a4361d6af6168b809c5e7b3a9294edbfffa91f83f6c00d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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
  • 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.
  • 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://medvor.ru/uplcv?utm_term=cheat+codes+for+gta+ballad+of+gay+tony+ps3+money PDF link annotation
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/akao58j56p3p4dhd3au151v2gl/43671478396.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/95807683529.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/16859147649.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/1772282301613e26606ed62.pdfIn PDF document text
    • http://cabini.it/userfiles/files/joxugufukugijivida.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109020835354434.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/zamizatilirelo.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a296d39b---93297055251.pdfIn PDF document text
    • https://energooptima.hu/upload/File/zamesidobeduzuse.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/98844724346.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/vupesefulavukedezata.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/teposanafevubedumixedato.pdfIn PDF document text
    • https://laser123.com/geektic/files/sipufowiwiwez.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/40503383137.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/mozagufasuzukagugupede.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/babinotodafi.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/vijekev.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210911235245.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/48073845185.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a982f646---13434865426.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/34196139806.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/fuwegot.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613429ccda916---30498093516.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/lipanoteginumepasalitor.pdfIn PDF document text
    • http://vswet.ru/f/vamilelitofidudu.pdfIn PDF document text

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