Malicious PDF — malware analysis report

Static analysis result for SHA-256 3952052302268008…

MALICIOUS

PDF

61.0 KB Created: 2021-09-10 13:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7542622fe5467fd127d0191d3697562 SHA-1: 8686b59cc8baeb2f61a2934ca30161d4738d8fc6 SHA-256: 395205230226800884cb016da6add30bfeed55428b6dec37f61e36fadb2bb769
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=non+sporting+dog+breeds PDF link annotation
    • http://quangcaosms.org/media/ftp/file/mizozixapozesirejudeviki.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/nexunez.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/85170407636.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/tetagusinitide.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/golozokit.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/vugopuzoxikakotomomet.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/57528595433.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/33265582506.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/golutanebibusatup.pdfIn PDF document text
    • http://sro52.ru/uploads/files/69180720075.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/febelob.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/40468312972.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/88881628760.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/91511215939.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad4cf5f6d9---binuvejatabopadiguvon.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/januvovibudik.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109080757007637.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/jijorurokunizotusidof.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/84221122245.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/9412733319.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aaa98cf04---9947351441.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/tixori.pdfIn PDF document text
    • http://healthywithhart.com/res/file/ritubilapofawomenobu.pdfIn PDF document text

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