Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5318b96bc3f2758…

MALICIOUS

PDF

55.7 KB Created: 2021-06-20 15:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 465765f42486e1ac4214a7e84e804603 SHA-1: e48be2e2039bcf2b58d9b6f1e15a258a01ed64ca SHA-256: b5318b96bc3f27582223683b73816940de81b577f34e0a96304b76e81a812bf8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing multiple URLs pointing to compromised WordPress upload directories. The primary malicious URL identified is http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cdec9587d3d610342111eb8f654587ba/61694191910.pdf, which is hosted on disposable infrastructure. The document body contains garbled text and metadata, suggesting it is not intended for direct user interaction but rather to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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 http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cdec9587d3d610342111eb8f654587ba/61694191910.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b29e1215a---wevugizexuzibono.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082c81a78b23---wofuwexamoguza.pdf
    • http://cambresisemploi.fr/ckfinder/userfiles/files/sovusatibomabekanidaw.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/c7a3c13c0ebd2d022fc044c54fae23b6/xubenomovipotonesor.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/81ae51b84611f0df3f2831e8b41ba766/jivarilekewos.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2de2577348581d835a98b02c8cac7cfd/siluvazuboreweju.pdf
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/muwagevigelivugoxokemimi.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/73214992cf7620d65718c3214c67dd28/73793031773.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ncqiiduui5mlvfn9k85bv7vv8h/losajadevenomegegidigazu.pdf
    • http://ahkjt.com/upfile/file/kugebapajudeba.pdf
    • https://nestaerospace.com/uploads/file/gurowodekezituzuwunufoze.pdf
    • http://bannermaul.com/userData/board/file/zoxux.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+dark+knight+rises+apk+mod

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