Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de024415abcf053…

MALICIOUS

PDF

54.0 KB Created: 2021-09-19 16:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d3edfa9b94c30065ccd37989ff01e50 SHA-1: 6d2f04dd579111cd288410c8279a0c944fc93608 SHA-256: 1de024415abcf053f2d5b58de7252be04af456bf65055d351fae0a13757ef451
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains embedded JavaScript and a link farm pointing to multiple disposable hosts, likely intended to redirect users to malicious content. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375b210a91a---99668279052.pdf In PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/biwamifufivugefuni.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/xuxibemapixilub.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/66982471513.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/wezofas.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28776750094.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/wibuwilulokimijupepuji.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/wifoporokoburode.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467e59251c5---liwarodekewukenizazi.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/letek.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/dutiwopifokile.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16134a1be3c5fb---522090153.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/kanisapa.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306cd934d13---mafugilosazunubijinomikus.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/64336913867.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/mitakupamotegimoz.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/xikefugatalez.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/witoxeribuditud.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/kusajidujadojuribige.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/57750268423.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8e4408af2---54209929629.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/83662445697.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/buxanev.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/95227654755.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/713418666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=note+10+lite+wallpaper+4kPDF link annotation

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