Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee9ec41af4fd18…

MALICIOUS

PDF

71.6 KB Created: 2021-09-03 14:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7433ab17ab70ff84abd9e530c74a690 SHA-1: 4a0857d20a4b5ac6a237cd92823ebc884274eefd SHA-256: 7fee9ec41af4fd189da0fca86df56d57d468b3824fd139bbb1ea6da5dadc1d8d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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 http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1b92cb974---97290658609.pdf In PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d52a5ebf---7978021596.pdfIn PDF document text
    • https://ms01bet.com/contents/files/wetavolusulimutix.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160727fe52e2ec---97292156714.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/49420653694.pdfIn PDF document text
    • https://businesslife.com/content/file/revuzowiwudapoj.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/iva0ighldthtenv60iecc261e7/10790083813.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/jagapenupale.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/56016883561.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/d0jough0bkt4p0ldd7841dqoca/putotexe.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611f742889474---lemosabugipavim.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/38268273795.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/e1a0fa3beb8ca710d92c39d2ca8ad6f9/69086289195.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/49429805048.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/nazorevasosirafegup.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082623635023---54168544850.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e664ecffe---kuvaze.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e11053a99a0---62921483587.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/lebero.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/61mae15dmcjpgovcqlk8m95emd/76685599451.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5d47450a3---39713242352.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3edeee722ab0bbc23f1bc8a3bd0a33c4/pasipufemorulebirowep.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/82718344244.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/wuzovutoxonenip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=avifauna+colombiana+ayerbe+pdfPDF 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_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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