Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3642c0ac8bfca…

MALICIOUS

PDF

80.0 KB Created: 2021-08-03 11:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a54992ced019ee732c5680706335693b SHA-1: c874b9e56a20a66091459ece81e64f17959d2a7b SHA-256: dfc3642c0ac8bfcabb22e1e33374b5434796d063d08fadc85e3ce63b6be02003
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, several of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. The file's structure and content suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9302

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 http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac023c488c7---50587333104.pdf In PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/givaxifajepixelizijelagon.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089443d0d830---47520740946.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c57558fa9---11131610049.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/dedusabuzavuxirivizuxad.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba0bd7b028---wofunowigorokeki.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/21702075435.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/19b77d19c9108fc7387fb48fa831372e/98600602770.pdfIn PDF document text
    • http://thepducphat.com/upload/files/gavegafewazawokagoxusedib.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821082acf85---mikivaletajogewi.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd387ff72---pesixud.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/66109392285.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/jkrhlo73b06bs83bn2crko8m0u/57080103478.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3c37e35e0---27133511042.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/41455681127.pdfIn PDF document text
    • http://minhanh.com/files/nekalozukoxosabufijur.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ehtuoavq5fkcdgkdludmjheo60/78447760300.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/ramejade.pdfIn PDF document text
    • https://superchills.com/userfiles/file/xexigifowixiloraredazaju.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/e0e2e5bf2e7f2c2b817aaadc8c08ec8f/witojozubesipafo.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/88152085224.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/80053396052.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/lavirijuxigipokusagigod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+does+jelly+mean+in+spanishPDF link annotation

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