Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa05aaf08c09801…

MALICIOUS

PDF

54.0 KB Created: 2021-09-06 10:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 448add02c4603351169bcb5150590463 SHA-1: 38118da76106488cfe8f210209f0284e38effe62 SHA-256: 0fa05aaf08c098017c6a51c15606482468cd3c2046a5417db426c8166a9db6be
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The sample's structure and heuristic firings suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6438

Heuristics 5

  • 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.
  • 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://ketoanaca.com/uploads/image/files/wopubamozelomilefazibemir.pdf In PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a04162a2---nuxiwode.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/34405342934.pdfIn PDF document text
    • http://brlairport.com/images/file/nedoxosa.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/30159301510.pdfIn PDF document text
    • https://hagepoorter.be/files/files/76377581716.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608116090f76c---babitemamufoduweb.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/7297684454.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/16939595142.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2e9b2bffe6338466f0f580c4cf2b2d8/piwasi.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/56942504077.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/nanugujogogaligujetug.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/16303287318.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2436cb75c6cb78a6dfbbf7ee99600ab8/74616003277.pdfIn PDF document text
    • http://krzeptowski.pl/file/xajobifosofepozakedokezu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/00deaabf2b5e4729da9bda427f35a71b/rafixeputijubaj.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d33fa277c21b36ef2dfbcb57df508ff9/58512253549.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210716_1BBB4E76159CEDD7.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/d5i5s8ojrbf1lsvtk6lc38a2q6/fagaluganuvidakosiwotutov.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/79569973634.pdfIn PDF document text
    • http://jar-ted.pl/file/82786538985.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/milalanudexilixu.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210604_145300.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160795d5ca5ba9---jixafijolawamivukagepo.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/xepivulelisenonikuwu.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/bba5d38c381141d99da0f54cd622cea7/goxetefutaxabakif.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/3bomo5jl77pch1mmu81k67gcgu/zelesug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=magnetism+multiple+choice+questions+and+answers+pdfPDF link annotation

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