Malicious PDF — malware analysis report

Static analysis result for SHA-256 c847225bc31d4ef8…

MALICIOUS

PDF

50.1 KB Created: 2021-09-03 08:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e3dae975da97d49eed83c39fae31ab2c SHA-1: ce52b7c90ab8dd6cb85aaf51a66e4087ae417941 SHA-256: c847225bc31d4ef89b40a02b49dd4edae4286b8316aff7a31810ec4d0facc51d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users into clicking through to a secondary malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

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://crewmak.ru/uplcv?utm_term=deep+learning+pdf+github PDF link annotation
    • https://tidymoney.com/ckfinder/userfiles/files/62306852068.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/sovatidapulazezab.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9117d14b---bugowufizeg.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/2p8auf8a5shpuhhtb1cvr10l4j/sogekunetofuwa.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/girisaxuvadaranuraxomi.pdfIn PDF document text
    • http://hzqzg.com/d/files/wajolixora.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/35766671713.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b1761ac465a61a20b5cd37952724d5c6/rejujizulujefovak.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/18039093365.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/28307573765.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b066ca152e6---semeputox.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/lepamegojofesinizifam.pdfIn PDF document text
    • http://erex.hu/upload/file/nojabidevebole.pdfIn PDF document text
    • http://ipublicity.cz/data/file/77750905698.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb75a21790---tatotinigege.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6efa5acb3e---54144612792.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/67468179698.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511c3135ad---dodadilimolanapowewez.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3glr0i7j5iplu7hvkfh41qr2r4/jinobegisokofanevunimafef.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/gegoxane.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609acfc6bc505---12295755782.pdfIn PDF document text
    • https://aashianarealty.com/file/viwubowavalovutusagogidij.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/89918767652.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/guzikiguw.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075807166f87---vugovatotulu.pdfIn PDF document text

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