Malicious PDF — malware analysis report

Static analysis result for SHA-256 6537fc5755056828…

MALICIOUS

PDF

98.4 KB Created: 2021-07-14 04:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21f75fa6b4acc2124c79d8a43959a9a8 SHA-1: 606fc2e8f8fe104a418dfd059042decefd3502b6 SHA-256: 6537fc5755056828e397d83413374ebdb8a5bd6dc2b7615a47c74815694c244c
94 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDF files hosted on various websites, many of which appear to be compromised CMS upload directories. This suggests the document is part of a link farm or SEO poisoning campaign. The ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5293

Heuristics 4

  • 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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/845cf7600152e90ab6e2e4b2432a83f7/juxofoxi.pdf In PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/lavekenoluvebug.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/juxewo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7162199f4ef035b134bbb8dcab3381b6/pewubavipagaruka.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/jelob.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c283ace0---33584818308.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d2fb8f4a5---ravatamabaxevuloje.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/77180028761.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1e46c7076cb7a6a34a2bd1d4927fe00f/95453133939.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160ca11c3891cf---vewukaw.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/nusaguxetin.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b675bfc0d---66870126392.pdfIn PDF document text
    • http://riversedgefm.com/files/file/39720841969.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160817f1d1367a---69610692982.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160988e01abf51---67025064667.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160906b99377d5---79144157543.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/57e1d43adf6ee0bf821bc21cf988004a/vaxapapapabowupusunul.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/14848100104.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/gimasawusiditebumuvufilex.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dr6jut4soke6de1q77ehjgncvs/wogakosa.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/dudeziwizuragolewuwe.pdfIn PDF document text
    • https://lasanisports.com/files/wigesijozesulakewami.pdfIn PDF document text
    • https://airshow-bg.com/file/8629492747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=texas+hawks+and+falconsPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.