Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7a9144914fa3ba…

MALICIOUS

PDF

66.9 KB Created: 2021-08-13 06:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5eaf003042ec022cb2d64cd90fbba31 SHA-1: b8fe599accf97030bd2b9ac1bab53c8419db0622 SHA-256: 9d7a9144914fa3badb972b491224d83d71cde57ad68c40f19ed50c50950f49fc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely to host phishing pages or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9597

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://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd70dc71df---4582050434.pdf In PDF document text
    • https://anmimar.com/royal/userfiles/file/3024934528.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/zobowilijerikejego.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16082252267111---rugidivefufepikumuworoji.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/9343593428.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/jijibupofujosozos.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a949e6e8370---virawe.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1vigh1f6k340mv45dco203ai73/90373681340.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/watakuvivijuwivosutipad.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/60142724451.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/xegokelenekunofomegefo.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/womunezoliropariruziguv.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/3184182284.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160eca4e45d383---tunizevukama.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/28391413971.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/fogonopaf.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/bawavabaxij.pdfIn PDF document text
    • http://e-hane.com/files/jiguno.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/37521826d23a499b1b71db17a5d38daa/65229732420.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/67162365726.pdfIn PDF document text
    • https://digireg.es/upload/riwawanotevuzapoxitutov.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c9482c48---80757829153.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a144cbe4e7e---37430960529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+install+glacier+bay+water+dispenserPDF link annotation

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