Malicious PDF — malware analysis report

Static analysis result for SHA-256 595e50fda92ba887…

MALICIOUS

PDF

58.0 KB Created: 2021-06-20 02:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c2dbf1f7d46ccea2acc4727148a03312 SHA-1: d41cc57f96594e55ca4a336ececea2c6c7a9cb9d SHA-256: 595e50fda92ba887eb9f44bb2e31a43e5e315879d5f831a973e49dd588f93c0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malware or divulging sensitive information. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7204

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://nomylo.ru/uplcv?utm_term=solving+product+design+exercises+by+artiom+dashinsky PDF link annotation
    • https://fedico.ca/upload/editor/file/pobatozulosisoxu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084578b10c67---potonajerefalasonivi.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/409bf2eaf6102de8fb48816541a98b14/malom.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/080484096259365b9df9b7313ab729e4/nuzajaragunajopetobep.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77090d19e8---wajivotisarurisarabisapi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5c3728dac0f45ff51b94cadf261ef118/50249269533.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fkeptmb8o7i8fi2do5l101hati/vimusobilixer.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/jsgvib0qok8md18b52a4pcipt7/xolidijixexinuj.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608011c5dbf59---54986511615.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/xekujufoxanazegul.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608254cfbe83e---xadoxedageliwugatu.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/jarukevadifeji.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160722738c5635---46736960874.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/zamekidopumu.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/kopadusoboxeje.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/esush3cc9epijuolumu7gds26j/91001878942.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/65128743288.pdfIn PDF document text

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