Malicious PDF — malware analysis report

Static analysis result for SHA-256 96303f9e20db4f63…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 00:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8f21d2b29539cce59a7cdcd70f1b874a SHA-1: 55b2b260278a0dc05083bcb229f0b9a1427fe8e2 SHA-256: 96303f9e20db4f63a268d1a1bf81bd3964ad6ca92d45a3eed0cab50743de8cb1
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, hosting numerous URLs that point to other PDF files, likely to distribute malware or conduct phishing. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick users into clicking these links by impersonating an invoice or payment request.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676eea07c9---30667649373.pdf In PDF document text
    • https://xo-sound.ru/userfiles/file/gulamiw.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5qbgb1v60k851ncgakg84ne1ca/38307995662.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/k0646g31omolopg25lmf8uq050/lefuluvejesubumetu.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607861ae8b2af---bokolugeforowemaluw.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e80819bc0e---57466609568.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/vuzul.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d9fd6f9d11daa2cb6f0b1d5aaafece70/4116170527.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/50297203486.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/ditulureseg.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/xaxuxififisowa.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10f90d3329---21515173183.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/5300899386.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/dofezeb.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3366bbe3b7---jirexizamijamu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/65ad70048472e30d39fe7eb8125bb0da/25732636104.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/a4ce4168124b1af31ac55df2ff8fdbe6/xilemoxat.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/ruxomuminaxebixunil.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/40b1dd4701d46b3daeff0f6588f2f22c/rimorirelezixefemowa.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/zofaripazak.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kefokorivopukitifu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa2a00afac---lanoseweniwenonibiberamex.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/17647750346.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/57c6fddac5ccc5d7e13360299970ca08/zigifadatukajogiwapuz.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311a538f08---watulokonu.pdfIn PDF document text
    • https://digireg.si/upload/sunupewuguduboju.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/majobanixova.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rinuwigezoletedijonadew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=documentary+film+end+credits+orderPDF 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_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 17416 bytes
SHA-256: f8dda0b1db5c4f5bb38c7aee0e280c1d016006130dc528923b2228a0e10b2b89
font_01_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001358c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358C 10852 bytes
SHA-256: 51ad7c54688916001e28ffe329f59375a102977b8954282b8e02a41ca6b9b63c

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