Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c3640e15b62dae…

MALICIOUS

PDF

62.4 KB Created: 2021-07-05 21:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bb1dada67de8ea66ec335cd1f43214d5 SHA-1: 74a4f00795ff8cefbd222ceb46715ccfa1949ac5 SHA-256: 73c3640e15b62dae9e6b6c95996badf8c1471773c781b5271b1925b30d5412e4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV, indicating malicious intent. Numerous heuristics identified the PDF as a link farm, directing users to compromised WordPress uploads and disposable hosting sites. The embedded URLs likely serve as lures to phishing pages or malware downloaders.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4855

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=mbps+meaning+wifi PDF link annotation
    • http://carolinaboatclub.com/userfiles/file/75207701227.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/tcu8v15v1f6js28ol8d6c53gin/dozidute.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/reramodopamutak.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c165687b2---mijav.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/63945875483ae664e31c905c94f98ce9/47954389214.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087375311ef0---17055544762.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f2b9257d8de4530eb4e660f111a9088/34224079018.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da7558d9b3a---dosomelonev.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0eab1e5b1ba3a2f61d46811a88ab4a32/51966301887.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/014cae639e4bb90e6a0410323be0cffe/51678243207.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/gbktnjlh32vab2871ud6jnk047/kojetelipajodigeli.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/poruzo.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2af73fef5---67127391544.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34d25ef88a---81196018725.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/93308275609.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/vonaz.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/xazeb.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/92356212336.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/verarizuleluxibapi.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa407c4fd94---84296604023.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/zewidabupejor.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/17a072258a8f6886c6014b5f515940bc/99646709268.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/lapefenunuvogilolamezi.pdfIn PDF document text

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