Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed3181b26f0a487…

MALICIOUS

PDF

50.4 KB Created: 2021-09-09 06:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8003e3e553e26cd4e4845ec3d71c46f3 SHA-1: f27b446918dce9f66b4e3a7a55dc58dcb5e1e57c SHA-256: 9ed3181b26f0a48794c29a4abb13fd8216ec11022db11f36a7ef9e9d8fcb7edc
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or redirection attempt. The presence of a link farm on disposable hosting further supports a malicious intent to distribute further payloads or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5887

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd8da2a9ab---98975762746.pdf In PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210908051202.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-02-07-16-52-41.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/forisojaxini.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210902_070655.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090515374093770.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/9755631776.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/82622329360.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/94310250489.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/jexuwojigukufadifotox.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/79072772875.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109090504154861.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/zimuxut.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/16604192263.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/99748557747.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/lidamepixigajapekadotobo.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/21413841852.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/85d3eda41c65d1b76dbc10b6fe130515/zumijobemarolopum.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/tufodenuwojebuxed.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161395a0477a0e---gitunemovag.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/8419047193.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/jelif.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/88367520780.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/23a78bc14471f0fe011347157ae652d9/xixobotajogaxamepalun.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16136d9366b491---mekexaligovukopenorubone.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/63828486324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mcpe+derp+skinPDF link annotation
    • http://irodori.kir.jp/files/file/39731048936.pdfIn PDF document text

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