Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39a44aa60bf6f2e…

MALICIOUS

PDF

72.3 KB Created: 2021-07-25 06:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe53ffa9f51664e4dfb7d578f7634e90 SHA-1: ecee1b75984752c398800b73caa9441b40468a9d SHA-256: a39a44aa60bf6f2e25aee3c3ef3d04e74cc3876164a08a58e8178f4c387f74f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised CMS upload directories, indicating a pattern of hosting malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the presence of compromised links points towards an attack pattern designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9527

Heuristics 5

  • 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.
  • 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.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160986623eabda---11393112130.pdf In PDF document text
    • http://drkoopman.nl/cmsimages/file/84669475908.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fokmup7veucfvdnnu290mi0q57/74138160856.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/xigaxinutivuwel.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/omp89p3tjnvjhaquekkdhfo4e7/94718123143.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/tijukuvitufunemifixuwotak.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/55815536523.pdfIn PDF document text
    • http://starlightskiothon.ca/clients/4/44/44db284a3a4a6a3f34f8f2fa71918f98/File/bevofidod.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/75918788630.pdfIn PDF document text
    • http://vizcsap.hu/files/file/425116176.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1626917125.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/d5l4iv7bta6ea6en9866aeko24/86011206264.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/pudaterupufuf.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/53139071400.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac61a02b1---99745276070.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/ceoat9h0ntjiquvt7ff13ktb81/87560332592.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/caae12e2956f90c2b448597f813898df/pufimofu.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210719_F2B45550EDC9FD94.pdfIn PDF document text
    • https://777mto.com/contents//files/runivugenakugekugabizivad.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/xaxipuvasutef.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/nofezosu.pdfIn PDF document text
    • http://derma-dts.de/files/file/72283344836.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/kajevigopipikejuzawatonod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+add+custom+dlc+to+rocksmith+2014PDF link annotation

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