Malicious PDF — malware analysis report

Static analysis result for SHA-256 321645733bd49478…

MALICIOUS

PDF

70.3 KB Created: 2021-09-02 23:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e766db55ed5a2563bca0724b6f55a50a SHA-1: cb3fa035eb34399e883bdeaf7c0106a1c4a17d14 SHA-256: 321645733bd49478e14b42ec7012a9ecdadf3bb33c559361c6fc00ae8d098e18
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to lure users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8769

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 http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0hjk345qnv4s8sqokbshopd68d/44331135704.pdf In PDF document text
    • https://ecoledesgourmets.com/userfiles/file/fufirikimiratuti.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/22d9e694d08c031b1db36ddce1a81c16/48827548147.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/ramaraluzasadupesepasevav.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf580aabfa---banojanisadin.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb215a83a63---24812623503.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/lodopux.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/waxamejiravot.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d976734d920---rovibifofeteruwapipa.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/lamapidepige.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/23261181721.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/70959528709.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/69722534711.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/75801557469.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/6mv55nfqcl3et8ordrrtltpv32/12022756807.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/54318653333.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/silakotumozisolojufinosob.pdfIn PDF document text
    • https://zzhqhi.com/d/files/48491957171.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/3959c4eb9fda2d65287a5d0ed3268c15/zirumawovo.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9c741a69b06f698c2490ed75df610867/82012895823.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f51a13c5a3---40903437154.pdfIn PDF document text
    • https://computerzone.pk/file/jadiboruxibitez.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/tizazexakebikoseboxejok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pelvimetria+externa+e+interna+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 19056 bytes
SHA-256: e7a2e0e828e8d764ffc45dac978183dbc6f4ec9b20b3149b32f14b400247b254
font_01_sfnt_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 10540 bytes
SHA-256: 7c04522c0bc107b728a4d7d2ffdf3c42cb9c2ffa9b7dfb1de12252b881bfece0

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