Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fdc2b91a7b009b…

MALICIOUS

PDF

86.6 KB Created: 2021-07-27 06:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6cb4625f1979cb78ac54ea333ffcadec SHA-1: 69b826ebbcb957e6bbb6c30f86d04a51674634d4 SHA-256: e0fdc2b91a7b009bce8700fed73c6c08ee0c092e167547e96a372d541e2b7055
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, including one pointing to a compromised WordPress upload, suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/3194193972.pdf In PDF document text
    • http://angelescare.com/userfiles/file/18424606849.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/pupexuxovutinalavuzag.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/38352354412.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/32484185810.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/84011207625.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/lanalizejoku.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/mupobofogefume.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8e0192f25---4030729272.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9271abfb---favonowane.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d34d07a9683---85983268539.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/841bc9442899e0761316405a549eadbc/10629134944.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/jexevefumijulewikos.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/kigaxote.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7adb0d2f43---73326098435.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/55957807187.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7b1d10fbc01f079e05a202712199d5f2/bijijosazezivitefijadasum.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086632e2035c---xijiwamukat.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3d10dec83---98947915580.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1acd847a9c0c4ec5bf1ba9f6029fafd6/50988931965.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/dugujofukurowatixu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f4e919383---7706745224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mount+and+blade+2+bannerlord+cheat+engine+troopsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 17148 bytes
SHA-256: 9418682960952168e71eaaa728e8b51cb6d21a34ff57ad5428f5760375bb4555
font_01_sfnt_off00011a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A93 11148 bytes
SHA-256: 519a8d5f95116f639aafb71b3a39b6063060ce37bdda0a82de6fd8986f6f18cb
font_02_sfnt_off00013430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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