Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe7e04314f4e522…

MALICIOUS

PDF

58.1 KB Created: 2021-09-14 13:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cfd8b0fd4eeb95ea0c3b5f5ec0c3923 SHA-1: 4350d4ba60314fdeef19947a578a31c9650b2b2a SHA-256: 1fe7e04314f4e522d0ae60bf55da56ffb1e9c72c3fa78703ed76954bee52a1bd
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://warmistore.com/userfiles/file/tolirumezibojisiwogigusu.pdf In PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/fda0ddcfa8496912aa4ceb22a417d575/kajekakunubanepuxovazot.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/gewemabetorezor.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/sovemoje.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/9953743857.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/93519211086.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/23356939078.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///mufimofixozakikasisi.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49141020919.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/zurisisasuju.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/60322823856.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f03ef542579f911a39dfa42dabf7ce4f/juvuvizowetowafolavamijab.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/namefa.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/tiworojo.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/kojajuzamuzudul.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/rumenaravofu.pdfIn PDF document text
    • https://amgaa.org/temp/files/nukiburewo.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/tixijejigobijimupulip.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/luxalofajuxikolejepu.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/vinalovute.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161404c904e843---vumujavutekexivepe.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/nawotujizorepire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=background+video+recorder+downloadPDF link annotation

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