Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d721267629b1f08…

MALICIOUS

PDF

73.4 KB Created: 2021-08-09 08:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f02c8513fc7e225a3f7c2fe92385cead SHA-1: d14bf7a2b62d6063e50cbb9cd2df0587d8f6309b SHA-256: 7d721267629b1f0818edacd6eae7cb9e3af0f722c0c59731aa7b2645af87e0e7
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lure users to download further content. The ML classifier also flagged this PDF as malicious. The presence of these links and the nature of the hosting indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9307

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://laborke.ru/uplcv?utm_term=vishnu+sahasranamam+kannada+lyrics+pdf+download
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e1564942d---pilutapokobetasasilagiwib.pdf
    • http://zae.me/datafiles/file/12887365290.pdf
    • https://careoncall.in/userfiles/files/61180294135.pdf
    • http://sntaviator.ru/ckfinder/userfiles/files/1769466605.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/denofofisir.pdf
    • http://cke.hk/userfiles/xovimuda.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/6e4b57109c6c53b9a60bf681aee1ddff/dapalarafono.pdf
    • http://tischlerei-schlusche.de/sites/default/files/file/didesuxarebuzolexoramoga.pdf
    • http://nedirajtebosnu.net/userfiles/file/95823107083.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/55562845549.pdf
    • http://metafelix.it/userfiles/files/186824775.pdf
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/64972950252.pdf
    • http://conhantaoankhanh.com/webroot/img/files/xibife.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc98c4814---katijinowafubidolediv.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/78aacb1d2cfa83315789d454084ad607/zipikamalejumejame.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d458ca6a4---lagof.pdf
    • https://mayxaydungthienlong.com/uploads/files/files/1400832474.pdf
    • http://uco-kampen.com/media/files/57188122615.pdf
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/gubaxi.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae49e3030f---78087605554.pdf
    • https://cecprint.com/images/file/53231067207.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ri5m9uuqclt4gv41t16oiqrmss/tazugiremeperi.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d825.bin
61077aa495046c303ac48cfbb455f38693eb554c14dde4d209303b1777674765
pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 11016 bytes
font_01_sfnt_off0000f193.bin
58ab3db91a88b77cd71b2985159b40abbd593b2b257f4cf28e6c9fcfd5372ff6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 17920 bytes