Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b1d4e18376f197…

MALICIOUS

PDF

112.3 KB Created: 2021-09-04 03:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3c75b83dd82411e6c155075fa6476409 SHA-1: 86542836e53683c8fc06f0ca75d125582ed3450e SHA-256: 62b1d4e18376f19725c5c16f8757952837187cfe15772d224c01af976d0970b8
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. Several of these URLs lead to compromised CMS uploads or disposable hosting, suggesting an intent to distribute phishing content or malware. The PDF's structure and the nature of the linked sites strongly indicate a malicious purpose, likely related to initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.1247

Heuristics 5

  • 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
  • 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://geostudio.eu/userfiles/files/tobud.pdf In PDF document text
    • https://hosvagyok.hu/userfiles/file/milagijopebunekavi.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/594825bd622095e25c686dd1cd5f1893/piladu.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/zavobifomokatabiropemewe.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/44901620827.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/80e0045886ce3c42bf1fb0b08000ae4e/46377577593.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/teximoxa.pdfIn PDF document text
    • https://cargobull.cz/res/file/xewemokip.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/kowimememofojus.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/5649627428.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/55486757749.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/fbc3dbced18b53e56629ca0916c8881e/javabewo.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/87qs9uki0j7791ubg9jre5f244/43403680544.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b69b9262c9f---kokeser.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd386ea6cc---18532988566.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/f53d33ae1897a9f39019e65bacc7ff83/89312146112.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/tixuxurato.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/jabasarikexemadixok.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/dunowabiguninagul.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210623103320_ijtlrz.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/9605ecea6f723300d7a9436291b9b74f/fazirup.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/bagaxumejizixale.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/bm5srkirsk9gp8ms798g2vtjtb/1309727520.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/99119472034.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/43502478191.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/16803583778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=together+with+sanskrit+class+10+pdfPDF link annotation
    • 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_off00015bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BCA 16624 bytes
SHA-256: 1b6b89ec69856cc664fea6ceed0f7a8a66c2398a4fa06cc5f9b1ac7c39914e04
font_01_sfnt_off00017346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17346 2256 bytes
SHA-256: 621de9dd441e6d21c33e1a747072e48ece75110abf731d234aeb955c807e7f21
font_02_sfnt_off00017d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D51 28712 bytes
SHA-256: c0518f7d6b57a25a576bee9e39c7a7a14a9f6f731fb0f2f213cab10dbb31b36b