Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efac697c1fa65e6…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 07:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf9f2e78b99367c336ec7dbec06f2252 SHA-1: 089746d7603c7b5e6dbad30947d5188077fb5b11 SHA-256: 2efac697c1fa65e6a04c311266519ab8cdc63d9293fdac0f6ec835aacd5487ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a compromised CMS upload link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6416

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://www.agcontraincendios.es//ckfinder/userfiles/files/dogoluriroxejurujefitif.pdf In PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160747c5e5f43c---20252513555.pdfIn PDF document text
    • http://zgic.ru/!upload/files/lonidijodijixagaxabo.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb73b5fc17---suretusezunitan.pdfIn PDF document text
    • https://birudongker.com/contents//files/70723111127.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/990t57juc7fmrefrcvu40qerj7/41141835211.pdfIn PDF document text
    • http://knoxvillecentralhs1966.com/clients/8/8c/8c0a3a1fea337096d337135aeb812fb1/File/vawozudixigaju.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b40b7b974a---kunepib.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b67d15f1---nezewitu.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/lomarogepewuwajibi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/fubabab.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5eca8aa56dd5195bdcabc6eea1fb5c21/464527941.pdfIn PDF document text
    • http://hasyo.net/files/file/dojozerevadogipidumaku.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c3dc218d---13265013048.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0fdef4839aba8b4485601b60b2d8195/pividowowigerosigenonufi.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/petelinapexipuxi.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-2/20210902065059545941.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/51e3b972d01d1fe449a1b681c0a1c23b/20606178658.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2738bc6f9---lubuzekemasokoxuzugid.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/videbugevok.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6443400682---sajibujidirujolu.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b69bb6cf5---68604759018.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/35f77e75dc8f4e619692f87c31ff8faa/74392106270.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098acd8b7620---53104761810.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3ae118262---dekubodo.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607534bf318fd---timeripofamurepaloxaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=encyclop%C3%A9die+universalis+pdfPDF 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_off0000e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 21216 bytes
SHA-256: b3fdfe79f222cef47cdd2876ece485722b61a97e455bffc24450e09127a0b3bc