Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be848e2c8d0f522…

MALICIOUS

PDF

78.1 KB Created: 2021-06-11 06:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eb843511e3c66461032c9025df222c2d SHA-1: 3e2a27690140b9c6ce643f4867b1606a8caa8265 SHA-256: 8be848e2c8d0f5220e8faecd4cc07d64186b292d5e5b98774615b1b5409fcbab
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6870

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 https://crewmak.ru/uplcv?utm_term=ghost+client+minecraft+1.8 PDF link annotation
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729c7d8b058---gamoninijusabigi.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608576f6b3487---19619439511.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/79048720694.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1dccef987---wepubomarasozunazosob.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e51923ca9---vojefubabepata.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file/%5C/damidovubejirozuperire.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a73f7c45a---18341123423.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ca50ad48bb1bcacbb5d27c4f6b5edc0a/73179838582.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0h30dltji78qdh82fpl4l48jap/jexututod.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/gikhecdeu0lmfe9aohs6ei2ue5/tejuduj.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083460e2a46c---fabezituxinatokegeri.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/1d4e8e0a67adef8ee7278fc0b260697c/19605883930.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077538f30a32---wakoxolebiduzorudexuwan.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1da32f0a1c---53417788077.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/jf971cf953b80n7dpu1righpli/69548446000.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9c80a92b3d2cf85b0361fc1f58ba7213/pafogow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001261e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1261E 13547 bytes
SHA-256: 53fdfbb77660b1ceea30f89eaa71999191a3c16b78d088d576089477dc654d36
font_00_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 5428 bytes
SHA-256: c0e20a8fc795d0ff60a2ff54a41a050b617653d0ab16918f100ba388c02d4d74
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 11668 bytes
SHA-256: 3644b9f22dfc70f9a4ab6e06941cea76e46d5e3b467963d04f89c8f6d6d62fed

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