Malicious PDF — malware analysis report

Static analysis result for SHA-256 78936f6c366af769…

MALICIOUS

PDF

58.6 KB Created: 2021-09-09 20:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: f2824c3f3bd5f5084d541b567d8ba2e4 SHA-1: 4d07fd99eb23407c438fab1e3d0dc7df031cc9c6 SHA-256: 78936f6c366af769aa65b40fc1de87feaefad71beb6c1bf77928fd27b3163572
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3246

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=vsdc+video+editing+software+free+download+for+windows+7 PDF link annotation
    • https://ontech.vn/images/ckeditor/files/50122692896.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/xisukojegimurepisagason.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362e5c85d1f---fizifugeledipowevipa.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/xededokumabolajosamolana.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/gofugolid.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/tabax.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/91138022669.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/53077812232.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139acf3c386a---4783419318.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/27674287827.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/redofog.pdfIn PDF document text
    • https://satyawatioverseas.com/userfiles/file/9272299871.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/nukobakaxas.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/15603532048.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/xotajuxe.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/tonumasogukadadebug.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/41458035730.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/penakaluwijizudova.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/lepepezosurutefovuvuxugo.pdfIn PDF document text
    • http://atsolution.org/userfiles/file/20210907061346628936767.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/pigofodotuvetuvonulabo.pdfIn PDF document text
    • http://446888.top/userfiles/file/14230062001.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/66ee45e2c590726c3a0cfa1b408e1c97/furorunamozalupopiva.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/2432888102.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/17239773121.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202196926393775.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/jujajerurexaguvawowafe.pdfIn PDF document text

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