Malicious PDF — malware analysis report

Static analysis result for SHA-256 3819c6e0cbb753b8…

MALICIOUS

PDF

88.8 KB Created: 2021-06-28 04:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 818be3bb2e8b87dd498459a461c81f55 SHA-1: 6b663c8d1154e88fc70cc9c24e496873f5a6872e SHA-256: 3819c6e0cbb753b8be26b9588a82edc40c8c81ddc76d0c3378680e63d97bec35
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6426

Heuristics 5

  • 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.
  • 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=reactive+lymphoid+hyperplasia+treatment+in+dogs PDF link annotation
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8260b6604---fopetavozif.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/20975094427.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kovum.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/7poi8t82ef0pstq8g1ed9lpjsd/21602841812.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210624_A1BC815069DABC93.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/77818348706.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a678a4722c8---95685381881.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd566578a14---fajufefopafokizulij.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/verekudawegitukelixageke.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099ab4bd95b1---fowokuwanadu.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/fomabodekuz.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/04c87dd8701d5207c16ef1c3ff327d19/kapakavodupugigimivora.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/gipejobifexatulepusegoz.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/889d9794f533681c69e8e536243e7e48/gexotorukidiwolimupibi.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/nq9s6rfh5htj0k8iltv40nkds5/terojexakib.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/81784273510.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422bfac726---6181011629.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/21067965416.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/67421435571.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607caf3be62dc---97782875221.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1aeb2cce0---zegavudunokujirun.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/jinew.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/20868767594.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 18624 bytes
SHA-256: 9c9700ea061aec8b1df8a22536f02a1cfe62263c4d85632e899db96892e6bbbd

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