Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f993a64db7b273…

MALICIOUS

PDF

98.5 KB Created: 2021-06-20 10:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0409bc042fb361283fbe88052d5d6ebc SHA-1: ad6d5544da0c1fa8bf8ccc905f25c37410418bff SHA-256: 12f993a64db7b2736eee8b8340dc7b2d63e6936833adce744908bbd12f201c45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9467

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://catamma.ru/uplcv?utm_term=boltune+earbuds+instructions PDF link annotation
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a07542fef74e6f92506bea69e51dd218/8593757214.pdfIn PDF document text
    • https://emmaushuis.org/pages/kitigi.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/muzefakikedewiniwip.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c467c3eef6---momumigenikeba.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/79b27ccbca71899f00aa28ba630cfa2d/lomogenepo.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083da8026920---simebovusura.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/49865832917.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/f1d2a1b9cd89740c3bcc45623753932c/32995666290.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/mosukupiguvuko.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/kovofep.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb38ab8a6ee480e77c2430c5ca9071df/wonovenoxiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5087d7260a---julesosokumuri.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/969de17vv47m9dbm5606ueb7m3/19793677498.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/xitekakapetexesibivubo.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/df226c38a5a378820782889e34fd6ae7/xegoxegirone.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/20826134698.pdfIn PDF document text

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