Malicious PDF — malware analysis report

Static analysis result for SHA-256 0268ca72e7c03ff6…

MALICIOUS

PDF

46.5 KB Created: 2021-08-28 00:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 194be2bad442c9086ee0fbd768719a60 SHA-1: cde73718dd9e31d84beda765f8f4f47bcf0270af SHA-256: 0268ca72e7c03ff6d41b46f06b17d726e83daa908192a5b50acc5de78836eb47
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious redirection. ClamAV detection as Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 further supports its malicious nature. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5469

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://infrive.ru/uplcv?utm_term=how+to+give+someone+a+hickey PDF link annotation
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f55cdc5c398b68971d9393a672c1ec6a/53961104072.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3d9f6151f91ca6c60a80bd46ed24478c/livajerijeka.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/zamaxevobimabotadovewe.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/liwofazepi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4f08e604---tiwikenod.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/vibedovemuledurazunuf.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c344e00d6eb---58919822127.pdfIn PDF document text
    • http://vucert.vn/uploads/files/6033148459.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/buxezopigoku.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/13953626319.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vemivivanetagepefuta.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b066840a2cd---najepelatuj.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f1e0b2112---86670821887.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/75830338316.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/tojila.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/35274374152.pdfIn PDF document text
    • https://zd-zeta.com/uploads//files/202108042228478112.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a37196106f---powowadew.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/xomowudamijoweleved.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075d32dbf41b---ritofakul.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/91rn84kgvilsr816o3c0b92qfo/romoworumedore.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/mubuxajazemese.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/basim.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/domekabowiponerevaxi.pdfIn PDF document text

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