Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfebba6fb7077e0e…

MALICIOUS

PDF

45.9 KB Created: 2021-09-20 15:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: eaa56a1ca7b3debac473c51efbb31279 SHA-1: b3cd3c3e23bbb5bd7142ad3ed0e348f8bf1473a1 SHA-256: dfebba6fb7077e0eb76a52c8374a0c1688ed00a82627cc176d539ae38c5dd0e6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to compromised WordPress uploads and other domains, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7840

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://www.majbrno.cz/uploads/files/gonekuzarepakexiwisiwel.pdf In PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/8209112119.pdfIn PDF document text
    • http://trubaopt.ru/content/file/17887503404.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140618029f1a---toxesamibuzatel.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/fomubevigewi.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/jatopat.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/41285785563.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/1bebq8mtq4f107b5g4454dmkml/29078185616.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/70296739526.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/tinevupilinamikili.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/69076810448.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/66916794978.pdfIn PDF document text
    • http://dobermanncz.eu/files/69467804417.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a313d73503---gamapisizilotuwoluwa.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/10546144359.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161440a373252f---92551814895.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2cegg173a2k7h2vjfccqbsi2v4/ruvoru.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/45917212148.pdfIn PDF document text
    • http://geoman.cz/data/file/8851728657.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/fuxamalubufinupotime.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/32355611324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=filmywap+apk+download+for+androidPDF link annotation

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