Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ee2bc70c0f1dc0…

MALICIOUS

PDF

44.7 KB Created: 2021-08-18 04:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f2bf993442a9bae993cdad0fbae3dccc SHA-1: 687970eedae716e483743bd54fcbfa69539f15ab SHA-256: 70ee2bc70c0f1dc024db30f86cb77922d5d732dbd55d6e3303ff0d21dfc98cc4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7035

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://synerhu.ru/uplcv?utm_term=verbos+raiz+y+desinencia+ejercicios PDF link annotation
    • http://moscowprice.com/content/xuploadimages/file/39794760728.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091a61576b5c---30663883896.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/lapirivixisawedo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1c50839d9828400a2051a69d6b3a596c/pifezirorolilefazu.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160eca41aabcda---vobibewipusilurum.pdfIn PDF document text
    • http://iwishop.hu/file/xapubiwamokav.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/darijeviruri.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/zilelek.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/wakax.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/28085883904.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/gupozolofimob.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/bb5149bb6348fb2a678a169e13df179c/moxaz.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/11c9832271a4fe022c4875fad75654cd/52769768412.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4985fb6e72---derodojubowixukesi.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc7f91bb08---91820514849.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/wipin.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/8aungip0gfid4lun4b3gsdj1f2/xewukawexapolowunexero.pdfIn PDF document text

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