Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6f6b748dd5b409…

MALICIOUS

PDF

48.9 KB Created: 2021-09-26 04:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6263ef62c393b75db1b7820bf9b6fbb SHA-1: 6780f604d3a9e082f3ca8fa4c03d5aa7f872b509 SHA-256: fa6f6b748dd5b40951272e37f26692a6b7ec8e465e79e97666c76d1fe0cf8cf2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure suggests it's intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7449

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 https://inwebjor.ru/uplcv?utm_term=universal+adb+driver+windows+7+64+bit PDF link annotation
    • http://rakkhunnursinghome.com/user_img/files/63131187578.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/fexopemazewapiju.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/92672388291.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/10032022834.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/wupas.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e1236ad0150c265dc9a70d01202278d6/41783586635.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402d423c1ac---42927945345.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1613407ba17a1b---rosaj.pdfIn PDF document text
    • https://lyubomiradineva.com/files/file/zifosisowowanowi.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/77845510516.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/98911179889.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/58026234009.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4i8r9hlh0plmafddmk2bjgpkob/fazekufetazusoxalab.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/84338240606.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/wowil.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090512081773499.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210915_174731.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/442cnefh123e3b3uc9hodq86kb/wurifibebag.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021090312332473499.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/46880e3ad6596a0d835d7f6023259445/xedelosewowodoxuxinejusat.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/fuziriveki.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/80746914323.pdfIn PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/fatisukamuruzaxateba.pdfIn PDF document text

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