Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20f0a08a4e8f98f…

MALICIOUS

PDF

92.9 KB Created: 2021-10-04 20:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b93523bd7a19e4e0be39da06142846b8 SHA-1: 817c2ffd23f7a8197242b573e67a60f6a3f1362b SHA-256: e20f0a08a4e8f98f3b12b679e82c7a19bce05e8cbc98b36422b0e3a0a4ef94b3
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads. ClamAV detected this file as a phishing trojan, indicating a malicious intent to lure users to potentially harmful content. The presence of multiple links on disposable or compromised hosting suggests an attempt to distribute malicious payloads or phish for information.

Machine Learning

  • Nyx PDF Classifier clean score 0.2477

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372359ad351---luzofukojobulamozeji.pdf In PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136bbcf5dfe9---10745916568.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/wesijive.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/kakegemugotosiwo.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/bofabemagopaninow.pdfIn PDF document text
    • http://gist.adrianlechowicz.pl/userfiles/file/63416508402.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/8356787644.pdfIn PDF document text
    • https://kopari.hu/files/file/23538033176.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a9040878e29eb056e0127670240b6b39/nakusofakiwopotakalodot.pdfIn PDF document text
    • http://thietkeweblongan.com/upload/files/vikilitanudepowiran.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413e8381be9---fisubaxiwejogarifofuloted.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/kupobumapa.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/5593900969.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/51040476337.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492367b3d6d---lonakasitepaxebidutezakim.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/39657944183.pdfIn PDF document text
    • https://hgb.se/filer/file/laburexibibugaw.pdfIn PDF document text
    • https://mauspro.net/upload/files/9008219532.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/lerokogemozavanesozerimi.pdfIn PDF document text
    • http://premo.at/userfiles/file/kimanaxexogekiwevizi.pdfIn PDF document text
    • http://andreevka.topmebli.com/content/xuploadimages/file/xamopab.pdfIn PDF document text
    • http://trivio.it/userfiles/files/17866076522.pdfIn PDF document text
    • http://ministerium.pt/files/bosekanudiwe.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/67229761556.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/gekodibikomuron.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/pufunubirezoliza.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/sidogexogax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=artists+their+lives+and+works+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_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 20124 bytes
SHA-256: 5947d9dc8859014aa45fd9a0c048b558a093ba21020416f8cba167a48f9d1b73
font_01_sfnt_off000146c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C6 10820 bytes
SHA-256: 2f5971020eb1cceda593e2d7d23c6b4d5e5d8bc375dffbb394c7f655639409a1
font_02_sfnt_off00015fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1