Malicious PDF — malware analysis report

Static analysis result for SHA-256 febebb419b6826ac…

MALICIOUS

PDF

120.7 KB Created: 2021-07-13 22:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 30333097d4313e7b52c177e3564cea07 SHA-1: af1749043e43b46f283f8b233e17626b7b501a41 SHA-256: febebb419b6826ac5956f0df8ff77134f1989028b4e5f49859bcdbf6b4fc9dff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites. These sites host PDF files, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c13f727bdb---38407828570.pdf In PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/dijanuwotala.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9e52788db7530ffcd6f549d59d92b048/81412700364.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/bebose.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/94056685018.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45a061c6f---supekisonuwa.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/jigonesojudavebo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ua98j8gqvosrrtm43gl7rlhcol/puwetuwawiluwujowifejir.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/valodajoxezamewaraxogok.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/72924273804.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/suzevenaz.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/wuwim.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b69b89c3d2---32520510001.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d241c04e08---rilofefezoradosazada.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdd8213c51---pefopolaxude.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/diloxuluxinowojururapasu.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaba221859---58790505650.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/17433456537.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5279e55bb1709da9f4355c221ad45150/pozogipulidom.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/27899afcpjm23jedposau8aks2/futixenavunaniruz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8a14de345---31518782838.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/42399390860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=retort+processing+in+food+technology+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17611 17124 bytes
SHA-256: a2569e5a26fdd1d299175e955beaf34c6ea822789b072ee4882164229f64bb18
font_01_sfnt_off0001a30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A30A 10896 bytes
SHA-256: e3b0114a52ebd4452c39d726675e0c210f31a304c1a32986bd4bfcee39d501b6
font_02_sfnt_off0001bbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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