Malicious PDF — malware analysis report

Static analysis result for SHA-256 247d53916d5884ed…

MALICIOUS

PDF

55.1 KB Created: 2021-09-16 05:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5065947bd7fa4915819e203d9a387e2b SHA-1: 7c6e7785a0f4d3a53efac15716df35b1cd86cf52 SHA-256: 247d53916d5884ed082c6fd4cdb5a9fdb02fffff70791e050227156f50ebcf30
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to potentially compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The embedded JavaScript is a primary indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6836

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://cosmeticdermatologymiamibeach.com/uploads/data/files/55256748372.pdf In PDF document text
    • http://malifer.hu/upload/file/koguxokodezurirovubewe.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/47499779224.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/16424073578.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/55968514041.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/27914529480.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/vaxoniredapa.pdfIn PDF document text
    • http://aweibel.com/Photo/file/82585740356.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/41e1f3a929bd358a89c80a009b8155dc/fuferumenix.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/52379979091.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tebatafitawivarukasuz.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/998cd6e62c1d27a679f73aa0e5556c17/dozumokodosezilizi.pdfIn PDF document text
    • https://citronel.com/userfiles/files/jopenuvenivuvujalugasog.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/27098759026.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/5a76265466f1e102b9542dbe42e328d6/dagizevipewusipekek.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e7f0cabe6---jafusepapa.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/bivikeduruvalexi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6969efbeb---wizabanukirubajikamotogo.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/wekuxos.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/9346481882.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130d0575817c---vuritavep.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/61914ee1d5386a4eac72fb0084ed6bb5/79714022469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=casting+phone+on+tvPDF link annotation

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