Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95a81cfb044875d…

MALICIOUS

PDF

64.2 KB Created: 2021-09-06 05:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 15d484a12b70ce150aa33b820c11d06b SHA-1: 093a0f9182adb8efaed982f83c0628f18be13941 SHA-256: d95a81cfb044875d99dca8e7bc3fbfb5579d0431b664c901c663754a71d40f38
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The presence of these links and the detection results strongly indicate a phishing attempt or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

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://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5034e7c71---92080246055.pdf In PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/98388715017.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/18011610593.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16082de86424b6---35406030915.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9859c518---11224113538.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca2dcbc30---66280957546.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/4085808174.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/zatisulenowe.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/88861089748.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/suponeniviwogefenoz.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/zowimofipeduwikap.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/39155510112.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lm9fm5s61fjp84n7sbb35ac738/26684233376.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfb53cebee---wuxibijijuwedafan.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/nesurijav.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d1deb0ef013---wepunuluvigu.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/91879947873.pdfIn PDF document text
    • http://s-box.biz/upload/datoteke/liwivamuxukumomoxolo.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/xukogadimozikugunate.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a675b34f156---vojilesi.pdfIn PDF document text
    • http://teifsepahan.com/files/file/jowejoruwigidugojekapo.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/fizonemibavunefusuv.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/subiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bosch+shem63w55n+pdfPDF link annotation

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