Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcddd81a459664e…

MALICIOUS

PDF

77.0 KB Created: 2021-08-08 04:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4d3e9c1015edf415fbfec818944a5ed2 SHA-1: 56212c4aaeebfed4a0694ce243528a97e86ca6f7 SHA-256: 6dcddd81a459664e6a7a4a2603f78af1c9fba8c0bafb91b9c7fa6de0356b24ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially compromised or malicious websites. Heuristics indicate these links are hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9727

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://drafthe.ru/uplcv?utm_term=vinnaithandi+varuvaya+full+movie+hd PDF link annotation
    • http://irk-yoga.ru/upload/files/67235465918.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/18771977150.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/rupujezubimetiluvut.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/59315345969.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2beceb8ee---14635977336.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/vowuxesabitajidenaw.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e4237574---98731367127.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/g021cnv1ur9tveur4df8g3mnt2/87913648119.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/wixateku.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/wenafotojoberojuwewudasus.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lopukafafujapasotesur.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4obkdjg4nda242nl7q1qveri84/28921152625.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/q8f7dqtra1arkcpmfmq2k9lmgu/xitudodiwapemes.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/52474467037.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ll1mlj49mta1kc3kbc6rhei931/80298553986.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/52191236551.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t5pvtmee7pb3c5af0d1i0pb6a3/55203462765.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d36cf0f684cd9f595ad39e1c8af762e1/sunigupos.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/jowusudib.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f07fa7f468bafab13fe6e69ee799cc5a/lelumigus.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/47735572673.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a241fc23721---weforagexepuj.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-22/20210522001346337519.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/94609448582.pdfIn PDF document text

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