Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e05a03901ea5070…

MALICIOUS

PDF

80.1 KB Created: 2021-05-06 11:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31d31b6679fb084afec52fcf484aae5d SHA-1: 89a067c65f4d0fb4ee4515e8d675dd58473b2604 SHA-256: 0e05a03901ea507091a27ca72a96989c8d9ff6460cf46492b565b34151b7c277
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the presence of numerous suspicious URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8886

Heuristics 4

  • 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://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/aivah55292hscfgrn3tod6qhbe/36962733134.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074793d00536---detosuxusa.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/28ec9715358bfd0edeb219453e7bb627/9763204655.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3bb7b52f0---98771203780.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082909c221ab---77336585507.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072b3a8affac---21197347270.pdf
    • http://akinmedikal.com/uploads/file/sawikafezuxu.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29a6f4097---pewoj.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ml6t865mle0a6n3e48oft1eo94/dejabotunowumufuxove.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc88e304d5---22615689219.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/57c11bf316f3745f3ac0043acb7d1942/72064858580.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608127621093d---gufofob.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ffe3eb3ab---mekusafamamenefefodigaved.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b620de8bd---wezabinijafixubomutim.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608b802cd0e60---bimegafonowuxiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=making+good+decisions+worksheet
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd76.bin
379b13d8a3536b30cec99445314934183a72b7a6ea8ce4b092df6ddfc681216c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 5328 bytes
font_01_sfnt_off00010fb0.bin
1df129f94be64e5b81028f696944b61083307112b6a1eee8e19b5c8ed983e7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 11272 bytes

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