Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bf28cc6bacee95…

MALICIOUS

PDF

56.7 KB Created: 2021-09-08 09:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8af58c90989c4b5e6ac19bb42fe91345 SHA-1: 5a0fa8e9f9bfefe9a63e79a5869b9f576cb4a029 SHA-256: c4bf28cc6bacee957bff8c5e35660b95802a0d31df6df3be1fd64292b2dcfd2e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO manipulation. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

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://bakersfield.thepokeluau.com/uploads/files/nefofubusozojekiwezazuf.pdf In PDF document text
    • http://garage-fuji.jp/js/upload/files/jonaz.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160745dbfa10c8---faruravuvemejedewubopexep.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/zazesodotugofixifute.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64bd2a9ec---pamaxemi.pdfIn PDF document text
    • http://tercovci.cz/files/file/kixojawotiketupopalozosuv.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d010e8f466---95173910763.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/1731486438.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/salenuxojodi.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ae5161ef09f7ea9cf89a6288320cc229/fujobaxezofisusepifis.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ea01b7e48---xanerizukozuvabiwuxojimu.pdfIn PDF document text
    • http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/44201333124.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757687ac7c4---fekilovagisuvejozikuga.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/23724442317.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/78acfb2f5ed30b3d9dfdec770df9ced4/lolapebaverasaxuvemagabum.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/zufefoxekuxonaravu.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/89787010313.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe51e0f39e---44808147637.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/sifaduvulaxatubez.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/779986911.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be6acc9bd00---39417787418.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/narovikatovowozixuvinuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=49+chg90+qled+gaming+monitor+manualPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8ec05577995fb3ed13c97d04a2397d05/soliwotokovejivapirexuzaj.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.