Malicious PDF — malware analysis report

Static analysis result for SHA-256 1610f30d45b7b0d0…

MALICIOUS

PDF

38.9 KB Created: 2021-06-14 22:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1525eda2438e812f5a8a795d75e93f89 SHA-1: d0cc28ed5ce827ef6ade5800f3c617e977d30fd8 SHA-256: 1610f30d45b7b0d02a246c3d17262afd6a109bb9aed649845e174a6de3cf6db8
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF is designed as a phishing lure, presenting itself as an image to hide clickable links. It contains numerous URLs pointing to compromised WordPress sites, suggesting a campaign to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing pages or download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7318

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://nomylo.ru/uplcv?utm_term=six+string+fingerpicking+wonderful+tonight PDF link annotation
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160960decf33ad---15090599845.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/femifanekar.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/kufug.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/sokered.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/5f1e7f8cf6cfa53bcb113df73dc972d8/75152621996.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609090c79323c---kotabexivuxanonebalerixel.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1fc3394fcce1912f9fcc518ff7ba7010/wusozuriwinokabusijusosas.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/322ab1bf850b677df1650002e145b093/badijaxanavifuma.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/wuvudigewazewupale.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/93263800965.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160822343ed82e---lepezozenepegamid.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/3068824905.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a633f1d6aff---35681462200.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/11765995125.pdfIn PDF document text

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