Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd67c7d1d5dea275…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 05:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6b6de032d94935ccb2d12cb3804c1790 SHA-1: b06f8f6ddaa52c0dbe9c86aaf2c20bd1e1229530 SHA-256: cd67c7d1d5dea2759450a4c184b70f04385284afbbe74f0463f6d2068c783310
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

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://infrive.ru/uplcv?utm_term=computer+hardware+bangla+pdf+book PDF link annotation
    • http://majorpropertygroup.com/userfiles/files/14461857949.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/6487cd9bd57de9f5e919dee6640fb154/sisedosowimeto.pdfIn PDF document text
    • http://sbcnepal.com/images/file/vejolijulebupelovuxuziji.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784672a5050---70776697841.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/92852811353.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/20218255228.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0bf6c545---32623435944.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/3272a0d33e95164c2a142cbfc6cfafc9/51309756095.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/xatogeroki.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/af6543430becd2dc7c119928dab0eb8b/90422601585.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/gemuzosuxumitawazodabiz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/8fe9e62b11c95ca32c5593a58cda8a6a/55148168310.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/75791927746.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/vijuxudo.pdfIn PDF document text
    • http://shsclassof1970.org/clients/872719/File/mezadifurexasokufe.pdfIn PDF document text
    • http://banghenails.com/upload/file/53415504615.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609102a2a622e---48592213635.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/jimosotegomipasajani.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df74097e385---sixobat.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/39296483989.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080a23e0c9e6---mevekaxetexipenatevi.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/nitadajedoninekog.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/48973464240.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/savolunetutej.pdfIn PDF document text
    • http://medlab.webd.pl/upload/file/vokuvekepaxidefek.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 16536 bytes
SHA-256: 1b9864759f1b0ce25caff0845d34f95a038b259c29127cd76f0972a6ad9e74e0

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