Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb54b6f8f814e40…

MALICIOUS

PDF

65.1 KB Created: 2021-08-13 10:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74194f4d5d24e847d5207ae665c1d6f4 SHA-1: be8f1175f630ee6780d84d0b8fe1d372f63dab28 SHA-256: 8fb54b6f8f814e40f125efa370dc31ead12ac1a652ea2a455b693508bf307850
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable binary data, but the heuristics and URLs confirm the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8757

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d88ee2f93---xovebipoxedu.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fe5043a019ab350679a253fd565b6f78/31188679366.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/sigaboneleb.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/salamubunolodor.pdfIn PDF document text
    • http://prestopc.it/upload/file/gavisulusavekotopipegij.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/suvipepelagatodir.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/27514912440.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/ledipelegezojenose.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809aa1d202f---88115925532.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/ab848a2b9dc222dd3af8cab6a22ab76d/vitivosifozuw.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/58783805015.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/ligerukimeni.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/7c82db812230995c01abaf5252255fd1/wagerel.pdfIn PDF document text
    • https://shopabrang.com/images/files/monezotuzaxasulagi.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/nowesexasosudolubixiwuki.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/21859705741.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/nidifa.pdfIn PDF document text
    • https://topaldanang.vn/uploads/image/files/69742997516.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/nekenetawarugor.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/38221638928.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd581c75c56---74796851417.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/xefemesupunoloj.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc11b3735f---bujozusakajenepuv.pdfIn PDF document text
    • http://halanmilk.com/upload/files/44999267017.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5b197cbf37ba23b8e321f461cf128dbf/tobidarog.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/02c4d3475d6cfc3843777bda1894263b/soradivipagawab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tecno+12+18+respuestas+estructurasPDF link annotation

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