Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc7c5813997e891…

MALICIOUS

PDF

64.9 KB Created: 2021-09-16 03:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f9143f05a990fe5e9f29c54150ed6d2 SHA-1: 0b700652fc4884b91b94f390fc77d525321b8f8c SHA-256: adc7c5813997e891e30bab554ef8c45a35630a8e1f1cc13a9e373fe30ec19e5b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains or compromised WordPress sites. This suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7267

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 http://handgun.ee/media/file/sodiv.pdf In PDF document text
    • https://valerart.com/ckfinder/userfiles/files/lupivusiwimi.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/vebotojivafilotisirexiwo.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/31702535042.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/62345922180.pdfIn PDF document text
    • http://idcla.net/upload/files/detibozixotoz.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/25734011780.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/jefiregidisijuni.pdfIn PDF document text
    • http://hydrem.ru/images/file/lavepizidewoketi.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/o3s02ldtob7e30kote09i2q2cu/pajubonija.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161371153acb30---12331734355.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f11bc19ce0---60760512247.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/wisuzisegaxaxirabunetita.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/94004819602.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/43720979961.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/wusakijetunef.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/vuxiwajefulomotijilotus.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/litesabux.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/19405867082.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/67727311863.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/33596769552.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/diwupegigepugofinija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cool+roblox+housesPDF link annotation

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