Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a0f99479b33090…

MALICIOUS

PDF

48.0 KB Created: 2021-09-23 21:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee2b50b22bf84ac5f8d76c997f95a5e0 SHA-1: 63918f203096b2b9b89f9e0cb895da3e9cfb8196 SHA-256: f2a0f99479b3309036b81a8d4ea8fc7b44c830dc43fd5c20820a390fe3df88b4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6671

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 http://velisend.ru/photos/file/lemasarutubawetalibe.pdf In PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/zapapaxasaguwowujafesiwul.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/vigiwimipinosuvifimoni.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/99284450872.pdfIn PDF document text
    • https://istanajp.net/contents/files/jebumipubonala.pdfIn PDF document text
    • http://xycrusher.com/d/files/53504916185.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/satoxujofokibikazilisafax.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/10687578393.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/40990818586.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/jilujakegibagumosegizoxaw.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/mobikezalelebadazev.pdfIn PDF document text
    • http://unsersohn.com/images/file/tofiwipojawuxadi.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/lulusipojefas.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/81498720155.pdfIn PDF document text
    • https://fototipia.hu/files/files/koxilanefoxiwatuwirepiru.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161380d9f84e9d---43290169809.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479365628c1---rigajumesugi.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/zokarulonuxub.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f698d15a---93818301674.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/77559571529.pdfIn PDF document text
    • http://jarosi.hu/files/file/xekumozuxo.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/37970724652.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/9865456035.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/43171117813.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/ripubanat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=best+online+games+for+1gb+ram+androidPDF link annotation

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