Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b97a6c9896f5465…

MALICIOUS

PDF

84.4 KB Created: 2021-04-29 23:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d933935d8943c763811a78633d5ed113 SHA-1: cb098a52b21f122d11759b58f19416ee755e2489 SHA-256: 9b97a6c9896f5465a4fa8b56418e95791ccaa807bcf6ca84248fb47daf1e1872
154 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to lure victims. The presence of these links and the nature of the heuristic firings indicate a phishing or redirection attempt, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9537

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://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/fusdvp0i3nn473nrjlr67merf7/rumikaruritapinab.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0a3a8e7a13cf0a2d33a499cc60b70d63/sulatebadaken.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871c5dbd206---gekinurovevuxoladag.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0bcc9dc6---zevajolol.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4033876c8---tetadojulositijeter.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa7ed09d3---nunasojow.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/86e4434f83bc3d1e475a1895516bc954/tepitowusibuzu.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/696abe1ae1649971d46b817fedad9e11/72630647302.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881658d1f7a---kunega.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b3b2455911634e20171b77a6eaede63c/53648939030.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e87db63866---sakena.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/87b938d092dc629bba59305a51262b0e/43245829886.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/712838bc6d2c7684f0cb76441c93ba84/58872145195.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160767be3bf6d8---dilib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=bmi+chart+uk+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133f4.bin
c985fcd108b30e26b564d8d946abc4cd52f59d9e77b7584e73f5d3b1dbb7b514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133F4 5296 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.