Malicious PDF — malware analysis report

Static analysis result for SHA-256 5616670f07d6ccac…

MALICIOUS

PDF

71.6 KB Created: 2021-07-18 06:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 305649ac04e72f7c4a06ff5ddc62dcfc SHA-1: 727fd89955b9aba64aafae6e5a36dce2b823c5ee SHA-256: 5616670f07d6ccac05df972a160c4c5f3608de768e008ac29a9b024e884e1f5a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The primary attack pattern involves luring users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a02c3b58a5e---31941746346.pdf In PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086040a89195---kojojuweno.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/92bc0640560a6bc17f5cb238f7a5d575/38122695195.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/3fab9d2562b2d7ca455ac5be003418bb/jivibukiratexaxipaz.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608166f3a7e9d---79479903695.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/34477551215.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09f837c40---nawalufu.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811cba2e782---vebopebojevivagaxewa.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3c26a0951369875e37fe2776f14fadf4/rizejikovotosalatuvoteg.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4613d912eb8fbee8c6be2d24e2dafae9/gikisugitizexujivoxu.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/susefebanagebi.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/88072721522.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/0hetbsblgu450h997del1h5bv3/bumazetujozozidak.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608278900ff65---zujozo.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/zijofojuki.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/73263819081.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5lebtle3p927j51lqps8fuu1av/14917346855.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/83612372116.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/17512227671.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/094e929f15b2d6ddc585531b9e00cf1c/fekusugujixuwewa.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/zobotezitogunikuridej.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0648d9cdf---85287520122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=delta+to+wye+example+problems+with+solutionsPDF link annotation

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