Malicious PDF — malware analysis report

Static analysis result for SHA-256 e583f10502ecfe39…

MALICIOUS

PDF

56.0 KB Created: 2021-09-16 01:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 200a3362b6cb185b402dc1de5f72b7a7 SHA-1: b19047b31f6e381a747cee58b6684f628ef099df SHA-256: e583f10502ecfe3907ac30f5d8e1d19f7764c70a5fcb8eb05e2a593e4afeb622
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6236

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://www.cerel.eu/images/wyswig_images/file/16823605248.pdf In PDF document text
    • https://alstar.uz/images/shared/file/86757334966.pdfIn PDF document text
    • http://dasbluemchen.com/papir.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/rulizenagimojixip.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/kexunudixulijimunadusuziz.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/19ee74b9fc1865bcf8f8cb4ebc3ce950/kutopafavesukuvenawupeg.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///14440756692.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/65885022808.pdfIn PDF document text
    • https://value.ae/userfiles/file/pobafijulibebiromukubu.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/dejexonewufe.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/3ab93eba36a868610b687cced74f018d/kolegukifo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141f43fb9654---46266994790.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/94741855319.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/bovova.pdfIn PDF document text
    • https://viceda.com/userfiles/file/17665356784.pdfIn PDF document text
    • http://patroha.hu/file/sudejutifij.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137eba5f1402---sotokutemij.pdfIn PDF document text
    • http://eternoohydro.com/d/files/pifateludaxerapimidi.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecd9eee21e---vilosexisebubi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f75cd6522---vekebepivijurinebulesab.pdfIn PDF document text
    • http://93564497.com/userfiles/tufaweverat.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/11131882532.pdfIn PDF document text
    • https://curvy.tw/upload/files/2239017268.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/77351667153.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/23875115107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+find+ip+address+of+my+android+phonePDF link annotation

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