Malicious PDF — malware analysis report

Static analysis result for SHA-256 d169718e4f8b1284…

MALICIOUS

PDF

61.3 KB Created: 2021-08-16 19:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: d8352cf4a3d9bc698e17d8d8ff9de6b5 SHA-1: fe07f411999ad6e87a4b8f142018722cd7d3dad9 SHA-256: d169718e4f8b1284a7696fa5a1e6e09dcd0398abae254a75f8218b4dc81e4f36
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, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the nature of the hosting point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8746

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://larrialdiak.es/files/galeria/files/55818920470.pdf In PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/34cc2ebcc2d84cefcd9253ef7024faa0/pibimo.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29301602635.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94cbce2e96---zemolobojitajebajux.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vgi20lp6u05irfth9c37nd3te5/61226505104.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/rujaxebalejapolevorixid.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/24450538663.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/919bee40bb52cabcde6b1a341711565c/64846301055.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072bdf5def13---32998332505.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/8913059700.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/92080482909.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f19ff9cfa43---70841247333.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/1irshbgehcg8a880op0qjr9ci5/5678620313.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c3f9ec53---95459589855.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/fedekoxojuwasifa.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/67286506814.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0858eed1e---donuparewi.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16232463041418525573.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3fb7491df266a5c5ce9e7fd53a667ad0/mabisejumut.pdfIn PDF document text
    • https://businesslife.com/content/files/69807772772.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/6c6d501e72ff8eb1e3443050eff6a513/lofebi.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/seropam.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097501836bcd---97345371034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=exercices+les+points+align%C3%A9s+ce2PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC551 17136 bytes
SHA-256: 9e9ba18e93c5191d9b3c1d070c12c5274f33716a60d6f95833f7c71899b8d8d3

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