Malicious PDF — malware analysis report

Static analysis result for SHA-256 874a60fd48b375a7…

MALICIOUS

PDF

63.7 KB Created: 2021-06-12 08:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2a30e44163c786e8b4f749a90f9967f2 SHA-1: 4a927ec793e9f1be311af0bea20c08a69465d4c3 SHA-256: 874a60fd48b375a738dea0c328fec7fa5c5238d25d4ec7b7c081ed68921ede86
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9485

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://oniceh.ru/uplcv?utm_term=american+heritage+merit+badge+worksheet PDF link annotation
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/m9737rokv718poaipmnjrrrskq/dirug.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210602_105447.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/kulanamuzaguzupuxita.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c213816845b---nowafetomoturekorepovijem.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e4b9ccb7648d4bb057bc735b138432ec/kibujabenarabosulaxanusar.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e30ce0432---leredosoramife.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/zegovika.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e3ee5f6f---49594255890.pdfIn PDF document text
    • https://tappowine.com/file/lelugetijotesagiduj.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f42aa4cca6---97877994173.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/bafaxefekolegelub.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/sebemopowuxif.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b2b8139f6d82d720e0aeb31857f9ef95/manedexerotoromofes.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9883dc110e17148620c908ff4320c38b/potalovibuwajesola.pdfIn PDF document text

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