Malicious PDF — malware analysis report

Static analysis result for SHA-256 29abbf9af8c13696…

MALICIOUS

PDF

104.0 KB Created: 2021-08-09 09:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6b2bf4ec6d0d21fc70c98780fde386c5 SHA-1: c621569b680dcc2e6e380e0215b81c98bb1d58e7 SHA-256: 29abbf9af8c13696553cada68c39a6d325e434aa0ae28ef7737b66e351bd768d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to external sites, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9172

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://coretry.ru/uplcv?utm_term=karcher+720+mx+vue+eclat%C3%A9e PDF link annotation
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/21e31809fbb1030c2db291d9ccaee504/46432111498.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/nafuderazebasonutavipu.pdfIn PDF document text
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/69845155507.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf23d5a5de5---54553938371.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089726526dc1---4523798786.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110522ab464a---72890881143.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc04041880---50463925071.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/desimabewaramutubelakexas.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/44247346204.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/55951706405.pdfIn PDF document text
    • http://mamitobe.ru/files/file/ramididez.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/92271531273.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608164a3713fd---rejogajipavu.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/44963507375.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/622125a37dcae98e285df94f62f641f2/8779808681.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/79950450dcc06b5c7b32c9a6db749a89/bizagimerugorata.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215718131443.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5164e4b72d---zogame.pdfIn PDF document text
    • http://popmetre.com/news/files/94730658059.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/fovimapa.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e21f29c5---26251198365.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/99941595201.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e8651c96---liruwexawi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892819b6ab2---77229582512.pdfIn 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_off000134ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EF 21424 bytes
SHA-256: 546d37953add66d4005d69a0772f4fb0822561999dd21208fb02a3b9e737fd79
font_01_sfnt_off00016aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000182c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182C5 10716 bytes
SHA-256: 724c7b06d3572ae23e695f7baeb77fb4b6bbd7318a4c9d5d697be68b1a96c768

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