Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6515c61d6dfbbd…

MALICIOUS

PDF

70.7 KB Created: 2021-07-22 15:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 54bf8fdfaf390de527e56a8faba3835d SHA-1: b567842be0914775066d8106a6a1b0f4dfbfedcb SHA-256: bf6515c61d6dfbbd958b139642830b79e5f843ad3f0150d79a4dba602a62f3cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS uploads. The presence of numerous links on disposable hosting suggests an attempt to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8861

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 http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1a5c4312a---63788050764.pdf In PDF document text
    • https://viessmannboilers.ca/fck_upload/file/98279396285.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/suvunitojizadevigunadenev.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a41f9f667---60843075316.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609458736b455---70887613629.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/38590887060e1d10cf1b5e.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/5hop5sg2fi8c7jev4cel65lgrv/wigavened.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e613a88847---vuxarazilafupu.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/rigeni.pdfIn PDF document text
    • http://fleschimmo.lu/userfiles/files/9147610512.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/linekimuja.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e2782debb99---44143176043.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/xujokedixebopagupivoda.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c947007641e---43675009486.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/805f57de52072e1cbfd37273af85037f/telunasudoxetip.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/69da0a8a3862cf3d2475f398e27a5f24/memavefed.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0f2d179a0d54c9b15ac3cf4e3949dce0/lalikimivezade.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/16439989847.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cd9c941c3---89622041793.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/mivuwojuzexewexe.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/50f727db8d2d322190401b9be4d12e4e/81651431344.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d098cf4154---mirabadixovut.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/3c2918b0decb897d328edc949598dbe3/fuxinudin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=linux+run+compiled+c+programPDF link annotation

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