Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cf9490ea2b3c85…

MALICIOUS

PDF

44.3 KB Created: 2021-09-30 12:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a62e082d524ed4e7bddf58bfb27586ea SHA-1: c19f942264823e7687c20dfff127273b3ef9f573 SHA-256: 34cf9490ea2b3c857c26ff7d06c1a415455e8dfed1e7ccdeedd4783cd31160c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress upload directories or other disposable hosting. These links likely serve to redirect users to malicious sites for downloading malware or engaging in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7840

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 https://oniceh.ru/uplcv?utm_term=youtube+pink+apk+download+latest+version PDF link annotation
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/vlaivig57g2q7g6h8jbllgnt17/14117033404.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/xekaguraxasetovel.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/lesiku.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f501f851e1fd7eec16d19a3000543fec/83126509315.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0ab93d13509ae2429b6d284dc157fd4b/78197684768.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615260b9db67a---3350659311.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161437733c4ecd---vugiziwesolewoxorovifu.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/kovaxijenuriduvidasamaxup.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/susojod.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/tazamereparuzil.pdfIn PDF document text
    • https://harley.dataroom.tw/upload/files/voxezunegotafuletewudob.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/40858402413.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/39148588807.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/62612833980.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/naperur.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/fesadiradusudajevovagife.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/41426236420.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/14205705960.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/vifabunovuripewigewolu.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/gopekodadivetuvimupigoro.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/92513386104.pdfIn PDF document text

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