Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e2f34a4f14f5b0…

MALICIOUS

PDF

74.9 KB Created: 2021-09-08 10:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf35bed6264f858ac8161fef18b923d3 SHA-1: b7a64ea4938999c63e11cd28c30a0c1a7cbe8802 SHA-256: 57e2f34a4f14f5b0edd62b65a73bb413d1b4c76a3f07c223209c4894f638f88f
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The PDF's structure and link farm characteristics align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ptq8ajpmn9tdj0o3107m53o10/35181321424.pdf In PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/senemexivebosub.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4076490ea---nokeneb.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2aeebbc10e2addac50b3772977525ea4/xivoguwukubekunu.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/luteboraxu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609098bb98ed5---49228572761.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac912b7790c---tusikesif.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/fimad.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/49811014773.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/59927309828.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/bepujuzidesox.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/393c006df26128a0dbe1c8c5f57c2cc7/62497049613.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/facacf43ad98c6d843d84764ca389503/17316079652.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/gerizazisebedogu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6208ab3774---78157475617.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site//site/data/files/mofixu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7dfe8a179.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/60898095770.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e37e5aa23aa---jepizilomifozavunadumow.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/luxumejez.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a879e55cbee---tedawanipiro.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/dbef73b41590cd535dd3509ad5b35fde/boteweb.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d2af23de---60076163546.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/52760732768.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f4c36e5f5---zupizomibosogobuwojat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=convertir+wordpad+a+pdf+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 17460 bytes
SHA-256: 1b69f5032c91382655bb7a0309ed9ccd84188a473aadde0debc9508d93d4b97d