Malicious PDF — malware analysis report

Static analysis result for SHA-256 676989d68ad0bdee…

MALICIOUS

PDF

45.5 KB Created: 2021-07-17 20:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 15c2d031b318bb189dc1e2b209725425 SHA-1: a0ec5b05c3ff4eec226a3e3d49cd8a0d0320c684 SHA-256: 676989d68ad0bdee47c53f8662e80781a53dcbde93b7bd6dd1a86d6c510df9eb
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize WordPress plugin vulnerabilities for file hosting. ClamAV identified this as a phishing trojan, and ML classifiers also flagged it as malicious. The primary attack pattern involves directing users to external, potentially malicious content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6809

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://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8ed31707e9a582a2e12810dccb397859/81994953645.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b50a26cd0a4---79977413745.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce9deed589---jowodezetizomojigewapiv.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/wirafiragafijugo.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/96570165051.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160996cb78bc13---piwokuxumedovimigoz.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30d5684997---dibodadadesetu.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/81c3937dec511420989b21a0c4d85e30/53122115420.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/eq8agdhefl173qj370u4r2icm6/rutifigitukojemawosu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/ee1625e6b828610b94436dd7ce388d2a/60566109431.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/xewupuvepemipur.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1733902d06---19635504211.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/28c9c023945a9aaecaf2dfbbd7c749fe/92457376813.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/1e6674cb8eb5a0200944f39021e71b64/88504246974.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/93151255565.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c949be5525---sefavonapekenalopokakew.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/87553100044.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/flpvkb9ueg7i45l4q9f5sculq7/xugijezuwiwu.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/12801496330.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a021f0332d---62753549252.pdfIn PDF document text
    • http://gtshotel.it/images/file/6845724847.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/04b23cf739167bbedb94b47c32269ec2/6481284019.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/8bpdh08950ilbt2uf46i6i87m2/85086571835.pdfIn PDF document text
    • http://gdgom.com/upload/file/2106240244257294147fes6jfss0ge.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/79464236091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=digestion+of+food+flow+chartPDF link annotation

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