Malicious PDF — malware analysis report

Static analysis result for SHA-256 243a16369e48f266…

MALICIOUS

PDF

61.2 KB Created: 2021-09-20 01:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b91740b381da1808d7dcaaf614adb354 SHA-1: 478315add5aff9f9eb993a713d91d6f24a8742bd SHA-256: 243a16369e48f2665f3a3bfba23591db7dccca647203c598f3d2dd8ee91b624b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to various domains, many of which are hosted on disposable or compromised infrastructure, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7215

Heuristics 5

  • 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.
  • 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://madiran-cruduparadis.fr/ckfinder/userfiles/files/53222172420.pdf In PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/womuxawamisozefafajigitut.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/99082791837.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/davomewe.pdfIn PDF document text
    • https://marlin-shop.ru/ckfinder/userfiles/files/20147236306.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/varizixotulubipoka.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/nivezu.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210919214655.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/kigusamero.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16147abf0d6991---weterogasesenosajofoposi.pdfIn PDF document text
    • http://i-tos.com/userData/board/file/61503883619.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/3965878189.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/finusiwatikevadamenojavik.pdfIn PDF document text
    • https://educhina.mn/editor/files/92299797833.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/77008187546.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161453636e0b9a---ropamupubopumi.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/kh7ave6scfj9mlj8pq156tl9u1/5613890718.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/jetexunaziwilam.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/jawugi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/65e3cb96448c21c1b8e2c7ec8346ea93/retidarurepuvawunexuja.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/80220253841.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=free+android+time+management+gamesPDF link annotation

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