Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d314c8f7d303ce…

MALICIOUS

PDF

62.5 KB Created: 2021-09-12 00:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d9c972cc5f5402d35edf2d1cf7331c7d SHA-1: a5add80f0e7633371264990d88d6feca45e0c454 SHA-256: f6d314c8f7d303ce6a1489579d31f2f518ad9cfb67f35d7af5d0f71014033250
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The presence of multiple external URIs, many pointing to compromised WordPress uploads, indicates a link farm designed to redirect users to malicious content. ClamAV detection and ML classification further support its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9100

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://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613958ca6aa61---19823853777.pdf In PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af3c55eec2---polanasijorabuzuxi.pdfIn PDF document text
    • https://flammerouge.ch/userfiles/files/wurubajibawamuwebaviwer.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/kigurugusikuto.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/semazitujusaliribopezi.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/50891049098.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/zinoforilarizodi.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/wobozifawamidijoboruberi.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/koxota.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/60286882538.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cdae6a0f8---kalan.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/70491801952.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c50fb3ab1---kalazize.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/gijuxu.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/25511981650.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/jakikori.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/tukelero.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e26d09dc---91020941501.pdfIn PDF document text
    • https://hssanesteban.cl/files/fitezeju.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/didiroligilijivijesejimus.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5o1uthc7tedrj853krjbcetlin/rivuvamuzozuzijarabu.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/f7c5945d2ba0bb0c57a032a923d43dd9/legatasukofajutafen.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/6058843040.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/56228590960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=as+a+man+thinketh+free+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 10920 bytes
SHA-256: 53a8d943e30b3ecda98fc01e0c0c0e050e84a226ff16474e1d65d66d84c36dcb

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