Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6b4d526fd65ea6…

MALICIOUS

PDF

69.3 KB Created: 2021-08-14 23:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e82802dd9bc2c05a2af179cff6ae35d4 SHA-1: c458158fe620968e6441b73d69af5581cb8860c8 SHA-256: 7d6b4d526fd65ea63dfd20ae02925d25b41125fb9f2989e020e96638fc2367db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution vector. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites, suggesting an attempt to leverage these sites for further distribution or hosting of malicious content. The presence of multiple external links and the nature of the hosting point towards an effort to obscure the ultimate destination or to use trusted domains for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7039

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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/231f2a503b1ac53542fde361f116cb4d/pazogagu.pdf In PDF document text
    • https://aawyx.com/sites/default/imageuser/file/80642693378.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/76490075323.pdfIn PDF document text
    • http://henca.com/files/details/file/soxojipujumeza.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/xonavel.pdfIn PDF document text
    • https://cecprint.com/images/file/9085782884.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/fijoponu.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/39457877668.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/99ef3b5ffa98588acd356c6d26c801ae/34284253787.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa034203195---68713689297.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9c4e22d2e8d5ddc808e7386f5f345e7f/54015041569.pdfIn PDF document text
    • http://scoopsites.net/userfiles/file/marovatajat.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/cd4812885ff2edb1d3718f4e275ca19f/veletivez.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/86628726918.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/muwufudo.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16095f2af46654---75116413181.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/7k7aduvstqj26ak6viaffqaafa/korotodojodimekunewav.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2c09b1535---67831610028.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c34769c34d4---xofawepevexur.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/70478532544.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beea305221e---12345337397.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/n1qinqnqe9tmbcg3ll2b202svh/kavumoxexiwoneriwujed.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a55f617bbb42bfa1cc4fc912e1b64804/51953454383.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dekon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=problemas+resueltos+de+sistemas+de+control+pdfPDF 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_off0000cc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6C 16944 bytes
SHA-256: 954dab419cbef21cf2293aada06f9c4cb4ea9a5d474cc66bb3c1674f58c5b165
font_01_sfnt_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1