Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30acb3624a7fbe3…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 10:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f4ea611b7c9aed41bfd14ab8d212ebe6 SHA-1: fba3ffdbe357510d2da7aa2e81131760f712dfd8 SHA-256: d30acb3624a7fbe3ade48ec0f8f06a552daee4b7d2ad87d699f45aa533181330
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links indicate an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5048

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=manual+de+epidemiolog%C3%ADa+y+salud+p%C3%BAblica+panamericana+pdf PDF link annotation
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e166f13f05---dumasoxinelasoruxugadafak.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/6391808860.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/bajawavopaw.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/rosepaloluzadebuvan.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5dfea5837---lozazapidevinus.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/naralivedesiwulawewalax.pdfIn PDF document text
    • http://plncse.hu/php_data/file/nujepuwed.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa1c29279---rojepisup.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/bogan.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d3773b8817b---pedunoruwewipilivemeneti.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/nodexevigusobevakin.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/6da9d95f4253c00411aa904f7afacb8b/71248134343.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/58976999669.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/5c8f99c65f3dafa413bd8cfa372e1779/95383571023.pdfIn PDF document text
    • http://belovosushi.ru/files/kofemimoviwiwemuba.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/45d4110500cbbbd9f66b3b4154c631ab/xiket.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/34221619624.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/pededekiwukopemixi.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gebolawowokuxe.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf317252e6---jofagugatusapiwis.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16085e2da7ec30---74370373162.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/90588738474.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/17856620139.pdfIn PDF document text

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