Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca534d51101b023f…

MALICIOUS

PDF

45.6 KB Created: 2021-09-29 03:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d16b48a7b6c8fbb35dd9362c8e96091e SHA-1: 0cc8595dfe13af8e148f846b70885bb036e7f633 SHA-256: ca534d51101b023ff9593243f046e6efef8aad59c8191dfaf542bf6bfc155ac5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised or disposable domains, suggesting it's designed to trick users into downloading further malware. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7022

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://wsm.hk/images/uploadfiles/file/kezisesuvob.pdf In PDF document text
    • https://guineaservicesproviders.com/gsp/files/vinojisujarokuxifi.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/bobiwipuza.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/775018412.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/30726457588.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/mamuz.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/48653011664.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/975f4aa6f62e34edae3356566a02d5c4/fuwetezuzamimaro.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/45029167374.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/dogudeduleluropusowuro.pdfIn PDF document text
    • http://learningkey.org/userfiles/65564278544.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/zimavovig.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/39009978797.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/bilaritowibiririfuwamus.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/pigulubuxenesufa.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426d79a762d---77900523501.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/16438887547.pdfIn PDF document text
    • http://sungder.com/upload/fezawutuxiwefuzedomazur.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/dekar.pdfIn PDF document text
    • https://alutat.com/data/file/vereraxa.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614def63c2597---45527327804.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/15910170301.pdfIn PDF document text
    • https://everestart.com/images/stories/file/gezawud.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/rufisakojujomozapababetaw.pdfIn PDF document text
    • https://preciseenergygroup.com/media/52367406364.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/78135420374.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614972dd0ca9e---fikomirupoxudefejixaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=vlc+2021+apk+downloadPDF link annotation

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