Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c8ef9a1bed4373…

MALICIOUS

PDF

55.7 KB Created: 2021-09-11 00:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5325a020c4ca4ea99f09db017fc3432c SHA-1: 96344d0155074b462b3994d0714b451bd7ee61de SHA-256: 61c8ef9a1bed437330791b9ac295f7ca93eb5e2a1d08b65cfd16818f7973189a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware delivery vehicle. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

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://medvor.ru/uplcv?utm_term=ml+hack+no+cooldown PDF link annotation
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/xipulasilamobosan.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab6fd68a87---23089450722.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/34553355761.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/1075092903.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/238353101ea09ebbf7cb1d5a55d749e8/buvanedalinatovexasi.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/75164c701d41ccc20487c555531cb4f5/37160866289.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/42362889713.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/19234034759.pdfIn PDF document text
    • https://loctra.net/userfiles/file/39680020059.pdfIn PDF document text
    • https://eclearusa.com/images/file/kexopatijafaza.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/82862210453.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/xenotenodagikanigowewef.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/koxifenitez.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/51852076890.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/30013549642.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/kulelodumibowonetap.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/xelunidaladizigeberadi.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fubipewefe.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/sisoditatinu.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/40431234392.pdfIn PDF document text
    • http://krzeptowski.pl/file/94297709557.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109041023489820.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/tipijuboma.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/66786015432.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/64308606276.pdfIn PDF document text

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