Malicious PDF — malware analysis report

Static analysis result for SHA-256 668006de5402ea4e…

MALICIOUS

PDF

65.2 KB Created: 2021-09-06 20:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7bf5af628313de39de7b2576bc2eb6bf SHA-1: fc7dca9c2c8ea519494e75f8197fa0033dc9446f SHA-256: 668006de5402ea4e02d9dee9fc66482d1d74e128abc51b7bf2fa7fcd27d95302
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple compromised upload links suggests an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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://lawrenceyezersky.com/userfiles/file/pilagalulujabaj.pdf In PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/92304860708.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/59a9888c45635fe8c4ffc152bd168936/zobej.pdfIn PDF document text
    • http://crediramasrl.it/public/file/sonamefeludir.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/kupobajikevawenikabilaf.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/viwivetonopunusox.pdfIn PDF document text
    • http://beadsandsupplies.com/images/file/xidez.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/92986198408.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/xudelawonepugatibusomal.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/78552451687.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16098126646a0d---82716450310.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a93fc6767cad5c4ade5fe066e442e442/18595008065.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/c09850697cd904e56407e4931b1a8fbe/vaferu.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/wolufuguxe.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ac224d236---56384987851.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/wuvukilaforepegemiwaj.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1625648641.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161216c554b783---sojajakasenifevolukolezo.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/pajufubadiz.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/lefufokikizatakofexux.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/vorujinoxewupoziparuxe.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/51903047819.pdfIn PDF document text
    • http://koala-al.com/d/files/99819465738.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/xatuwe.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/38965228386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=converting+mixed+fractions+to+improper+fractions+worksheet+tesPDF link annotation

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