Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01c93ec478e9067…

MALICIOUS

PDF

86.3 KB Created: 2021-07-22 09:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e69cfe4f7e367106725a55c4c4bb129a SHA-1: 0e758b733ac5681b62fee5fdbd3cda8afeb36b51 SHA-256: b01c93ec478e90670efaa438fcfc6fb2f6ae0c19e0e13f7c5517215c80e5c44d
156 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 an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farm heuristics indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c65944233---59537347672.pdf In PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609841e1f2584---vuvovemozoturixarajaliro.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/rujopofafiloforemugujod.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a1f638f05279c69023fe3eeb4440e2a/9611793747.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/tezejinimut.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/vuxavijepupiduvefi.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/zaribodawomebo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f8e49db63---63589958069.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/watoxusodituzoj.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0ee52d5b3fda0acb9d6b30d001112ec7/sinuz.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/16177099136.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7c5ad3e46---39350877542.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/0lv1o5h45uae8povbfoeudom0r/dibaw.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/89632365424.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e48d488ad6b449ee6e7f0589a062e7e/wetiked.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qannq5nn9rgl63398aegt3kb71/lijejibunagik.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef23eca18---71352005387.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/b5ada8ac594f15c3e37cba70e7e71a26/17753682473.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/fb3e8c23b72b4bbca287093a1ab2b82b/6383402166.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/zoxujuxoj.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a564239321---84472019433.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/46ee8931f399ccd147de99c853f1b590/nodidefivugiliwixebun.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/jedebune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=father+christmas+other+namesPDF 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_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 17056 bytes
SHA-256: e197c71e94ce6ce9ebe663db93d7ce1558e86f28bbae967e232659b5bbcc1c55
font_01_sfnt_off00011be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FC 10428 bytes
SHA-256: 954c56f3b5bef2a1e221e0985401813cc1aad6856bd39440143c393ea741a2a1

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