Malicious PDF — malware analysis report

Static analysis result for SHA-256 63147761eb88efed…

MALICIOUS

PDF

112.0 KB Created: 2021-06-12 11:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d31fd7d75b3303b59bf3dd0e90268d9f SHA-1: b56bad3c917a79071a113003f01ce1d1615e16f5 SHA-256: 63147761eb88efed504e5359c4cc77573b379b20dacb9f565b67e154737ee730
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many hosted on compromised WordPress sites, that appear to be part of a link farm. One prominent URL, 'https://pistant.ru/uplcv?utm_term=jdk+8.251+download', suggests a lure for downloading software, likely to trick users into executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7535

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=jdk+8.251+download PDF link annotation
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcd5d90155---48198040458.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ed36bef61afad9b129cf932336631161/95636155363.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/sivetpv15ei84njrhelh1bk8od/zefatajuludafoxiwar.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d3966a5270829dd5483d37de31ea7463/mosabotitinexijovupapuluj.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/19214156952.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/movudimafafiponumofan.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/44090e79369ffcb9040e36a3873d154e/dekiwopubezukumet.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/lukelibefufilijeki.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2be37521ec---pefetijebase.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c782eef698---vafejerepifepupabulu.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/10160244222.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/nfj6ikjg2odh3mkb9tscbbgm60/88336945666.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/20160f38271a5d30098b597b7b441995/vopanigosiv.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/91714994504.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/60688656241.pdfIn PDF document text

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