Malicious PDF — malware analysis report

Static analysis result for SHA-256 119ed7248512af50…

MALICIOUS

PDF

50.9 KB Created: 2021-10-11 05:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 67cb7328ac9dd3f43f3b3aa9aa33be1d SHA-1: e4e6f101903b10b8c66570b730a7b25048f4dc1a SHA-256: 119ed7248512af50fc38275576daae4c99da15377051bf7e2686dbc2ba714d57
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. Heuristics indicate this PDF is designed to redirect users to external sites, potentially for phishing or to download further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8127

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/uplcv?utm_term=google+trademarks+search PDF link annotation
    • https://akconta.com/uploads/files/31460741728.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/gugesajup.pdfIn PDF document text
    • https://vgk.tw/upfile/files/2021/09/21/vuzuwasutozugesowibokax.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/gozegexopu.pdfIn PDF document text
    • https://tonitomov.com/picture/file/samusexinewexorodov.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1631279787.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tuxadagok.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/pemonamenikedi.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161604ab91e7e6---1904586472.pdfIn PDF document text
    • https://gilbertems.com/videos/file/wevud.pdfIn PDF document text
    • http://deforma.it/userfiles/files/soxanogegewokujajufikap.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091913585173499.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161445eb5223c6---tozapuribef.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210918_203901.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/41166862508.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/61579298502.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/lofesobilo.pdfIn PDF document text
    • http://stevis.cz/files/file/86944038951.pdfIn PDF document text

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