Malicious PDF — malware analysis report

Static analysis result for SHA-256 941d9eb072d94cf5…

MALICIOUS

PDF

44.3 KB Created: 2021-08-17 20:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 28f2a3f1c6a33a53b3b382149929aba1 SHA-1: 814fb2046548bfc87d81f460728558fe3d25bb60 SHA-256: 941d9eb072d94cf5ce398af4e1643380e2c67c28e769d87a68fa97cf7e17cf5f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7284

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.herbertvanderbrugghen.nl/draft/69836512249.pdf In PDF document text
    • http://www.provinces.cmcgeneralate.org/files/js/ckfinder/userfiles/files/71476260639.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/kizagapa.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/bibewerikomize.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/3130127705.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2201718590---mopavonilezubokili.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/q6su6auf95b5opckm1g0lank70/4452441966.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e62d448efd---juvinolipepi.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/40050213681.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106290838436351.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/21799432361.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/wepemesopulej.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/wokojaga.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/pamadakupami.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/44536358087.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610ef325613ea---54578615083.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/lewabaxIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dragon+ball+z+shin+budokai+6+ppsspp+download+emuparadisePDF link annotation

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