Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e50770a8fd9af6…

MALICIOUS

PDF

62.0 KB Created: 2021-09-09 17:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6654b52ee58ceb35dbf11f552138d806 SHA-1: f3dc0e7a252ff653e4e28c1b782123ca702ce77c SHA-256: 05e50770a8fd9af683bceea20567f24c7bd43083051a3c3acacbbfd4266342c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6913

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 http://lixupeng.com/uploads/files/wujemodijabamimagodanofo.pdf In PDF document text
    • http://rsentco.com/upload/file/22688507882.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/89376600737.pdfIn PDF document text
    • http://partnercable.com/files/mibekozefezevajevir.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1631177245275779712.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/60191653097.pdfIn PDF document text
    • http://ossokahve.com/upload/file/69979338785.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/40052999153.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/68527880606.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bc555bbad---xeguladixosesolikapasis.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/lunifinumugugoroluvonulon.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/livufimisiregekumiva.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/2885001229.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133614f8244a---pukowewodisevaj.pdfIn PDF document text
    • http://recviem.ru/img/upload/34426744865.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4bc33b774aae56ca610415b02ec9bc97/69011236044.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/51848779440.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130630463820---mawufizavajexawojuporuz.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/lugojate.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/89343160437.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/e2dfef77a146c1205d8fc95ed5fbb45d/xegubep.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090816573673499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=phone+freezing+up+androidPDF link annotation

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