Malicious PDF — malware analysis report

Static analysis result for SHA-256 af154dfd189a75cc…

MALICIOUS

PDF

52.6 KB Created: 2021-09-12 11:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ec9225206227211f1865d9306dc86b5 SHA-1: 779394352b0d35b81389c093e2668bedd995a8d9 SHA-256: af154dfd189a75cc59a7bc44cf852a97929161a10dc70952e3f2dffbc9820a45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the ML classifier's output further support a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6383

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://queure.ru/uplcv?utm_term=spin+and+win+iphone+8 PDF link annotation
    • http://hainfelderteich.at/xaniporufenavulalibo.pdfIn PDF document text
    • https://vitanov.rs/files/44843295135.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ba8c5b0bc---89062035493.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/woxajasixinetogutuji.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6999f12ce---6522388367.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/kokog.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/bemenokowivu.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/duzorejakaligozuxajopuzag.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/36138118151.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/tasoxupenifunudam.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/12110716247.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/79185818096.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/dimamabujisozumiw.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/329494463.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d724d6cba---judifola.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/10998200836.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/xinedavutapolonuxone.pdfIn PDF document text
    • http://3asoft.vn/img/files/kumol.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/wafazabularawis.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/2109090851173968137dvu3.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/b67nt8hi23gns4f88nheij57d4/wivupegutinamegabuwavit.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac6f7153d1---11666627045.pdfIn PDF document text
    • http://zl369.net/userfiles/file/59799224591.pdfIn PDF document text

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