Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7541f25add1cac9…

MALICIOUS

PDF

47.6 KB Created: 2021-06-25 18:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9b5fad6bc247c9a2c0b133d7b63fcb67 SHA-1: b6703ae288c47e7ba2f9c931b4a878a680c99cdd SHA-256: b7541f25add1cac9fb2bed7f9662496ab3b05e79b55e8ddfdc2d702df2da417b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/aodq0tpgeh0q2thpiidqivp48b/bixugusoxajatuwetotezataf.pdf In PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/bixodikedufaliladizuj.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/fawagutevejis.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160926ea7d6ffb---14419065275.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d32fb916668---3367166717.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/40028671878.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/85ac16b8fe1362f9803e97f9ff6e72a5/jimixipi.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/lovgt3v0fjocgrpv2au1scf8u1/49696202996.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da16134462---31582457431.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78a11262f---6212025855.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/87aaad6811ec59fb1a3be9a064c09738/80402196587.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d467649e91f---kurewojumumukosotolemila.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c5f76fabdf4d06b41bdad91fe390e7b4/16690396420.pdfIn PDF document text
    • http://bscartridge.com/pic/vanugodok.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kutodirotekonagu.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/g3hp0pfb37gc30d3ki8aemh3m1/56488165315.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/42ba975dbbd49fb72a02bad3a352b6eb/69930188780.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957948dcca6---64063177421.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/riwaxopisitemolesexapasu.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e128003fe08746309b8ca0994b12d9f3/82462948788.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/eca00e959e0ba3dfcad26b35eeac9513/pawakat.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/33523631644.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/f6cfa1b091dee1b018f029425b27a268/55337180133.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/77b35c2c46c3967a5f771d39c6ed11c9/bewixugufitamisawivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=bank+interview+question+and+answer+pdfPDF link annotation

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