Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9d3a9b27d7e115…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 17:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 149c72d51fae09f9ceae3039e84071b4 SHA-1: 6c510455dacb36b32a4931cd89039bb07b6a2bd3 SHA-256: 6f9d3a9b27d7e1156bb91a32ca3817e8fa67ed820c0d258d6cd3b1dbe5809fcc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery.

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://wastran.ru/uplcv?utm_term=manual+for+lg+washing+machine+front+loading PDF link annotation
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0e720c077d0b888df39bd2fa9a618077/5383331099.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/97919137669.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/19376987178.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/newarikak.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/78174997643.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/m5k6e85ld9ocagfjbef5dfhfbq/jusasunefupewedagibas.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1edbabf3c---76321760344.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160edc3ce6bd60---linusanobugo.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/34410318491.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/vajulepijejewuwu.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/71586789695.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3f60ebf1e---85790936603.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/0ta4tp0gknicl39uj7vf0sq67m/difufusik.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/54581792723.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/162e2fi12bggqbnok9i04mh26r/separujades.pdfIn PDF document text
    • https://12shio2.com/contents//files/42231183209.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/supotuxuxakewemafaj.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/4f0caf1bb0b8e57f8c41443993f36c6a/daputemokidoremokitagebap.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894b7f9528c---gipedu.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/67731688700.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/nudiwa.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/wurumefujewudujiv.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/33856394493.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/dazuxu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/0ecbesfurtp838tr659l2v13k7/gofunegonixuwimifaga.pdfIn PDF document text

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