Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c3b95b7d592e67…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 03:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c9ef5c13acbf7f07531fa39f8e9654e7 SHA-1: 0a6ea716d7a3c5553967196f0e69400d07fe99e1 SHA-256: 24c3b95b7d592e67b982b05ec06b2d3d0f9652878aa36479f868c7120df01a6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms strongly suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

Heuristics 5

  • 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 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://coretry.ru/uplcv?utm_term=how+to+use+phone+as+pc+keyboard PDF link annotation
    • http://cheumst.com/upload/fckeditor/file/59507011940.pdfIn PDF document text
    • http://sissonne.hu/editor_up/90308913925.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/soravamazulopusedad.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/81253564233.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/lolinadotewujesi.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/xoxofinitewisijovulekap.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/jukifatedagijevuvuxa.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/20246204238.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6182b1bcb5b8a4087fe242ce58ca49bf/50077897568.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/45970732657.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0f02f12f0---dajube.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/vafajulenofo.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/sipozikuzitos.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/37302087750.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/135187d446a88e6afc18e968735f5e75/75497212146.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/pulemiruvo.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/46988130532.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/73005205273.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/nemeximiwopokor.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/muxizamuzo.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5bc6e92e4b020437c9d78c16fe175315/jawazewalis.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/36983079444.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/92456642710.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/xepeto.pdfIn PDF document text

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