Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e96557aa39d7eb8…

MALICIOUS

PDF

59.6 KB Created: 2021-09-15 00:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef145074d9a203c733b12bcf1e160e4c SHA-1: 55c84d52244b87f90289b6b704328f5b036a4287 SHA-256: 5e96557aa39d7eb8712c4662a2d5771404938503594c0b344639fa85171d3729
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm or phishing attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://drafthe.ru/uplcv?utm_term=best+totally+free+games+for+android PDF link annotation
    • http://giovanniseneca.eu/userfiles/files/famopugefalalalexujiv.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/56116423351.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161406abda2717---25253650995.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/8699166076.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/lr1acvqs517isvtlattmc2abcu/86322755910.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411557e21bd---labavudi.pdfIn PDF document text
    • http://dsfly.com/uploads/files/noporukafem.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/zemekasatije.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f290b831b---2389992232.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/f0a0a9ac865de037750e055aab2dfde8/mewupobasasofiwodorow.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/88550540056.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/fasixuwomezosonav.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce1486eb20---9516792392.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/gibekokavezivamar.pdfIn PDF document text
    • http://aquatherm-graz.at/files/romoguxurokidogalekedaw.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/kezufe.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/58269035114.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1614111f9c1b75---vadosot.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/pimawigubodujizotal.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/pinafegedakafenaladuba.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/videgumigadijakan.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/825e30123cf61ff00485f896836c40a2/bepemegiluwokelejafej.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132ffbd2986b---jujapibapilegorate.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/dukalalegixaner.pdfIn PDF document text

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