Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b281244c3ba7cfd…

MALICIOUS

PDF

41.7 KB Created: 2021-09-04 19:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e945eb09fea322d974386023a5865933 SHA-1: 6482e4e71b889ced7c9d054e0160d607c8c9ab5e SHA-256: 9b281244c3ba7cfd4997087d499e61848315b9f1cc24c8ace3498eee8f10e7ee
174 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only content and a clickable action, typical of a screenshot-based attack. It contains numerous links pointing to compromised WordPress sites, suggesting a campaign to distribute further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7328

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 41 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 http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9795b12fa3d091e75c787c03212f8565/89722232523.pdf In PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da34574b72b---gokadulebopajej.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc0891dc1---xitirili.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/nosirevove.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f1aaf4e5b74655a8d49b48e1e84008fb/kowosivelusowupubuz.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/37582162801.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607052c961e6a---zimodovopalumesodatadasid.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/v40rk7ouptqbd7blljedb1afm4/87972475190.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/71579180958.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/zixabuvuvadonu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160966d31b777f---zemimejebikijokuvibapav.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/45113b79e133b90141434d9fd64b912f/29573414562.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/48586211047.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b259a3b8a6d---futor.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098875c919e7---13000903586.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/93296088329.pdfIn PDF document text
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/e262caa35b6fdf7855f33acb34c0ea04/61315919921.pdfIn PDF document text
    • https://kiptep.ru/file/waradoxinesof.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/nexedamaruzodubo.pdfIn PDF document text
    • http://aven.su/userfiles/file/togogix.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4315416fb---71206377340.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/4116011348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=phonology+and+phonetics+pdfPDF link annotation

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