Malicious PDF — malware analysis report

Static analysis result for SHA-256 e570f422aba8862d…

MALICIOUS

PDF

71.2 KB Created: 2021-09-02 03:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 46bc3da5ef8030cd64c74005fda19aba SHA-1: acbfcc80119321f26a0c7ea8f63c5430146665ad SHA-256: e570f422aba8862dc1a64ca71aa39da9e68311344fb2b384b5a54d4d9f5d921f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/8ji4r2330utdad0lqpfdjq9tba/dejowu.pdf In PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/48895296253.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/99003946380.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ce2f1445149edfb0a7c9d12020c0672f/8200392876.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/2568570885.pdfIn PDF document text
    • http://coumert.com/images/file/47601938194.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/4vlrjdk37obi5j97j1iu8j4rb0/60331285390.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/rinaba.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2d124ae7d540d8a6f3de96f9f9864266/57004709061.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073a40da9fd5---40716988096.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ad9427ce7b---60841759414.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/wobokodufuk.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/wajeretupuzejuk.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/supipevozavolazimugor.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210827095012.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/drj0aptiqafbvogie23i9ikdi7/99689460234.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/37597571492.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/92899921948.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/rabume.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/tilatura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=love+game+marilyn+mansonPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 10488 bytes
SHA-256: ef349fa14fb9b3879e7f2ec87ccfe71299ff96a0cfb9674376ab7df092d13acd

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