Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4ded81a80d5bbc…

MALICIOUS

PDF

112.4 KB Created: 2021-10-10 05:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7c2dde4ec8205017cd82659be4b0af86 SHA-1: 0904ae0a3d41eb1bb99099d077e7f0e621cb17a7 SHA-256: 5a4ded81a80d5bbcc2b937d63947e070771c83a3743b3af0d5855bec8630e368
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which appear to be disposable or compromised hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6795

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 http://zkmeiqi.com/admin/ckfinder/upfile/files/gimedogiretanazavalob.pdf In PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492021f3ea3---36678531241.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/68852595208.pdfIn PDF document text
    • http://alptw.com/images/files/xukobubamaparusumin.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/tuboza.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/73384336874.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/vovujunojigufagu.pdfIn PDF document text
    • https://mackbeks.com/files/file/89190633858.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/79666729788.pdfIn PDF document text
    • http://greenglobepms.com/uploads/98517860031.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210908_EB31009BB4DB5F1D.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/4953989387.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/tolukusoni.pdfIn PDF document text
    • https://exhibitproplus.net/mentorfinancial/page_images/file/nasoropokadew.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/mimapam.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/84701684077.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2396a56298f1a753a8062f6b96ff42e0/nisexuroxojub.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/silibimizapezunaliwo.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/92746469068.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/tobelurinuwuwab.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134929dacd81---11719279699.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/fupolojunif.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/39087169604.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/godovutuvetuwak.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/barorazara.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/wojezobolumuna.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210904_14C7E62444C6393C.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/30fc4a5b4e5ee08ccb63aa22430e2fc9/fijuvililemuvapox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=summary+of+war+and+work+by+john+ruskinPDF link annotation

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