Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0be19d70b9f80ec…

MALICIOUS

PDF

78.1 KB Created: 2021-09-02 08:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e08be6c808915526171ca9ff30d9b44 SHA-1: 8cdc300b71d1b804a706f2eec5779c90abbd053b SHA-256: f0be19d70b9f80ec32c537fe54f408e10723f93b6f0c29079eae9af3ce6e6ffb
94 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous compromised WordPress sites, likely intended to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs and a link farm on disposable hosting further supports this. No scripts were extracted, but the primary attack pattern involves luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

Heuristics 4

  • 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://drafthe.ru/uplcv?utm_term=porter+cable+5116+manual PDF link annotation
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cda1c2184e1---rixigedolufefofafo.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/jubaxesezirem.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/14036425544.pdfIn PDF document text
    • http://planbmedia.hu/files/govunemariretusajator.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/8d9vgu334l61mk85sl97pp12un/maguxobasikajinagibizipu.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/2648309233.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/62a878c5cc85951477d2f4b75a98efd9/zakifejiwojetoz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081738c35d8e---vixamodonel.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/46403839775.pdfIn PDF document text
    • http://dd-eng.com/files/files/2222440727.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba14d53c131---zipuvakilanawamikarakebog.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/83452797697.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210629230402_xt3yw7.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/biwenozugexakurubomop.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b704ffb4029---xokawojafuk.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/50196617015.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/193168090c41b36742ed8866eceb0b8b/95555490431.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/efef3602d811c81aaee26c5adf0eaad9/19131440240.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccf29222e---54686362805.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75b6e2e855---toresitadatafeloki.pdfIn PDF document text
    • https://biocoils.com/img/file/virojolegis.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/cc0f3733e656834011295c79610bc4cd/voxegawabora.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/wujij.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/47fa4f12434766f76ecf723ae815e100/tadelul.pdfIn PDF document text
    • 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_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 10724 bytes
SHA-256: 3dc98e1e25584211517e872e7abb0d2a81413fc792a2a75b9c086203bc15bc2f
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 19020 bytes
SHA-256: cb3301fc1454d9fc8840f1d999e681138d4e9cd4685726d97e793e59bd3b5264

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