Malicious PDF — malware analysis report

Static analysis result for SHA-256 3168896ad3d01400…

MALICIOUS

PDF

58.4 KB Created: 2021-07-18 11:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ac77fffd7b01a07024dae96b4cd0eb68 SHA-1: 53fa082e2d10713634b225ea108fe0a64b820e3a SHA-256: 3168896ad3d01400f5203eeb6f4480d318b5e7a7bf26a37031bd1c11bf2d3b94
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The PDF also functions as a link farm, pointing to multiple distinct hosts, many of which appear to be compromised WordPress upload directories. This suggests an attempt to lure victims to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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 http://palenice.net/obrazky_clanky/file/ziroretevonugozijagad.pdf In PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d4e8627fe82adb9cc5464be7a28695af/vifoferataxovumuravo.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ac1a512d---regafozezariwedofaso.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/94760538841.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/32736f5c22714b22634d45723b3d6ced/41669134775.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82454b4e2---sasitulabigu.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/c3b4b99329c4292d940bc7b62b65da93/vaxen.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/guret.pdfIn PDF document text
    • https://soechi.net/userfiles/file/78703188502.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/2335382312.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995f74a18cd---82326669685.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/kaxijugeseguvudetu.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b869c6067f7---boxoli.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/71834806227.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c4580a5f809257ddb24d9bf28e92a5ac/71435294171.pdfIn PDF document text
    • http://falerisztika.hu/tmp/72890574124.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a20c196d---24148648193.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/55304111551.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/a1ohesj7l9l36usccmrfij6rc4/63090853326.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/64178455022.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/zugifi.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/82045004578.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/pupitob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=jinx+meaning+in+englishPDF link annotation

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