Malicious PDF — malware analysis report

Static analysis result for SHA-256 182bc58a458318d5…

MALICIOUS

PDF

41.8 KB Created: 2021-10-03 15:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 24f5d3a13ddd273f0f2cc9e2930fbe20 SHA-1: 4393edc4da3a977336c60e218e2d272b684b1326 SHA-256: 182bc58a458318d5430dfd5763aa0419e347b91cac4b016fc90ed8c957500448
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload storage. The presence of 'utm_term' parameters in some URLs suggests a phishing or SEO manipulation attempt to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8315

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://catamma.ru/uplcv?utm_term=incompetent+cervix+meaning PDF link annotation
    • http://greece-ex.com/images/blog/file/gapanomu.pdfIn PDF document text
    • http://alcantara.cz/data/file/30809376576.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b6340285b---74471627233.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/gapexe.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/bikazaliduname.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/059b23f412b7f65a8bf7a785b0d2f794/pixubu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155fd69f362e---vegidopajerasijuge.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/4228834555.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/pobejejijupupebatolipo.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/71961423996.pdfIn PDF document text
    • http://ccadl.com/files/20210920051914.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/gogobusopixejabadesugoka.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/febasixapejenumunamutujav.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/61566867639.pdfIn PDF document text
    • https://bczenekar.uleshuzataruhaz.hu/files/file/jibebevonololiriri.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/zowixelaxofesefimewewu.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161525fa397000---56279029240.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/99169033220.pdfIn PDF document text
    • https://goodline.by/userfiles/file/33725872552.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/dunogorudegutipiku.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/41154391458.pdfIn PDF document text
    • http://leeandrewdavison.com/download/84559135749.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e84e881cb3036f24be4161fde5771b19/3274061841.pdfIn PDF document text

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