Malicious PDF — malware analysis report

Static analysis result for SHA-256 d425799cdc673aa6…

MALICIOUS

PDF

62.5 KB Created: 2021-06-17 04:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0f3a34557970df47684323fb00eb23c5 SHA-1: 3ff29c801d06a3b69c14db2b8829570a2b909bae SHA-256: d425799cdc673aa69caf410b2c5d8d9fea8b3aa6c03294f02bc374615322a1ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various compromised WordPress sites, likely intended to trick users into downloading a fake game. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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://laborke.ru/uplcv?utm_term=minecraft+earth+beta+download PDF link annotation
    • http://dlevitin.ru/fck_editor_files/files/piruxoziwazuk.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/navasojidofowo.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e5dec8ee82b3c7a324b76778c433c0ff/95349602332.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/922153f7225add651e0f2ad75aead7d7/4149098625.pdfIn PDF document text
    • http://terminsk.by/pics/files/38629959763.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bb72c68df04---22751436653.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/15584716455.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b2a00d496---53129533327.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/7e82bfe74b515fdbba5ec6ed769072c8/fatejaremurogezuz.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/2022374428.pdfIn PDF document text
    • https://memoservicesrl.it/file/xedazofum.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/66dbde40eb772f2a3f11cb5bacb3c00d/daxegejesugakasezojovej.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/2006040879.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/be64bb0b46f331b0ef95a2b7d2064514/fajarozomisuje.pdfIn PDF document text