Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3222a6243e77b26…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 19:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7967132c7ecef03b740aab948f56332 SHA-1: 1f062d4ba1bdd9addba823967cdc47b0b5d9832a SHA-256: f3222a6243e77b26e17e513fd54a36ed2d2640a91285fef3f4687594eb92f97e
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and contains multiple heuristics indicating it is a link farm hosted on potentially compromised or disposable domains. The embedded URLs, particularly those pointing to WordPress upload directories, suggest an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3567

Heuristics 5

  • 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
  • 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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614c249f2e21d---3916450582.pdf In PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/49040509732.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/pubawiganelebove.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210921_C2B3081851BA5D96.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/61370933427.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/tevidubatero.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/u866uoqmse93uc0sku0r9oaoc6/54964913408.pdfIn PDF document text
    • http://abnicum.com/files/file/depiwufigusarade.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/valelulepafemi.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/xabanilixiputuz.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b6ffdbcae---27536539019.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/pafafixevan.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/zapipitegepopefatuwuwovej.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/11788470367.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/95516247887.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/bigasogeraxorewasoxoso.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/vadezevedobimiwikodunax.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/rulum.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b03ef153d7---25313692713.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/54662755233.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9346929753.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/goxekaforuminazokesapinu.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/xifepiwuzafaneloro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=psychic+intelligence+pdfPDF link annotation
    • 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_off0000b010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB010 16784 bytes
SHA-256: a92240bd28e658f25f34b7d243939b33d16827f9279ccfbc448b501e48047f40
font_01_sfnt_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 10632 bytes
SHA-256: b58415478491d22e379b5b70586f7e74f751b6f31a8593445677c8cef1d55e09
font_02_sfnt_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1