Malicious PDF — malware analysis report

Static analysis result for SHA-256 c192905c00682d3f…

MALICIOUS

PDF

67.9 KB Created: 2021-09-02 10:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a464ac4687dc83fb5e0c1ba130bcf9b SHA-1: 5217b1d77ee04cb4568ad8b742da97b626827a2b SHA-256: c192905c00682d3f62ea1c01c475624c526e86539e773b1eaf6a5e960337a900
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, often initiated via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

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://manavpublicschool.org/manav/userfiles/file/83231032490.pdf In PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/83015600726.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/98199424480.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zenawejijol.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/robejorulagemuwax.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a8ee511bb---fedawuvese.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/teberexosutinulimegufego.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/papafewuxedeluxitatili.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/71915930712.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/jobowokorejukenubebubopi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/301733002133.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/qtb1fet8lvtt63n9gu51m0bhq0/falen.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/046d682a838bc35646c7116fb33d1451/53298437754.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/98095653578.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/82574515068.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8ef16e6534a986efd893338427ff5154/mugifotefuberu.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/sh2q19csj8m699g2q4s0p52326/51165322383.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dc7966121---bokuzezizodiligusuzewenej.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2c9bc8ddeff00000b84ae05f6576b72e/zifizaxobofonatupewufivib.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160963b3bc317d---55249440004.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/21295195963.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef4f9d44a7---bedosivuru.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/48595f7855a745d4bb8542dfd2e65ff0/gukudubifatiledekatejoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=is+unclaimed+property+taxablePDF link annotation

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