Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8a2f494eaa9df7…

MALICIOUS

PDF

42.4 KB Created: 2021-07-15 22:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 90b66df0de6135ae35de1812e745fd18 SHA-1: 24cb21376f78e9e040cdeed8f21592b17ae8440f SHA-256: ce8a2f494eaa9df790c83b992f54faff582871e64eb94f592356c3c613d509ce
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://nomylo.ru/uplcv?utm_term=class+11+physics+chapter+2+example+2.3 PDF link annotation
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4cb8ce07---56975134870.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/82473808064.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/42477617400.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608243459c7d5---gelosapoka.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/vavixekemanativuweg.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/b1taboust6k6kaoe2biqfgj5ff/20134236463.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/rdi3npmjae94cdpgespcmth150/60082686776.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/89046857577.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/30197061849.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/zixegedunurolemabuma.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/m7r2658bcu8pnaepr2gvk3ombn/8235567126.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/62ac583c44a089f48209fb98f05d15f1/74613921580.pdfIn PDF document text
    • http://vo23.ru/upload/file/80301576503.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/binoguduk.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/26681d564161a6ddf47c7b2b93d6b5fb/rapakutopeduwapewi.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/dixaregopeboxakitobuwuxu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce106470d8---xizexarubugebanewerukax.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bd2edfcd---kebunexomudirepabum.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a188f7e6b2b---75940405682.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd97977c539---demonurizofuxu.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/wunuzurunimiroraj.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/nujaxugi.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/3a179de32de44c71614db6e694f095cf/72807753382.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/sehrfuialdg90o7d5oiami5oik/47402361487.pdfIn PDF document text

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