Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d691ca2b936936d…

MALICIOUS

PDF

48.0 KB Created: 2021-09-19 04:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2223bda7b3cf4ba777fc56cac527634a SHA-1: 1e08338c7cde169014692b283f97a4e11931a54b SHA-256: 3d691ca2b936936d8ff82a5e336baa4fc6091b5374fd3d4cef0288a3b0dc828e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5549

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.pibmg.com.br/ckfinder/userfiles/files/files/31881345449.pdf In PDF document text
    • https://korovin.org/site/img_ufiles/93765551862.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/wevizujikebixasuzuguduxa.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/78842931547.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130af350ef98---tuxip.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/29246249158.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/sasulanusib.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/vefevelafonofavavuja.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/57873626773.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/40904478562.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/38898688983.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/28477113980.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/68383161616.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/77011356499.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/disuxubizumukuzavoxuvu.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/85767969356.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/46880e3ad6596a0d835d7f6023259445/xedelosewowodoxuxinejusat.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c3311985---59494227866.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/84059554897.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/79211203144.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091721120545.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/61036181482.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/82133010126.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614045814db31---22947410888.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452c4929c84---66126537194.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/mepeponoro.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/xukewosotetizoxodezizapab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=android+vidmate+downloaderPDF link annotation

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