Malicious PDF — malware analysis report

Static analysis result for SHA-256 094af10593a5dfc7…

MALICIOUS

PDF

81.8 KB Created: 2021-07-30 04:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5f220b922ab0498850640a313d4bba3 SHA-1: a83ebff1cf08e49538a1f2a9e850e027744738a4 SHA-256: 094af10593a5dfc79486a7dfb27207fcc589846994d69fd427c22be847dfe417
94 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. The presence of these links suggests an attempt to lure victims to external sites for further exploitation, such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9085

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://atvatextile.com/upload/ckfinder/files/9719098150.pdf In PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa373b607f9---3967960148.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094819f06457---wuvefikagaximozas.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/30933916279.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8c84e0f4a2b8670caee75dd4f0530d0f/fegisajosoluwotatij.pdfIn PDF document text
    • https://mmszke.hu/files/file/78939174913.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c617a50a---masoliladirumisebi.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210506035007266.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/juzebededetomolawijavere.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f7cae90d---sumik.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/pajuvaj.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/jewini.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/46641987356.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15abc2d0a---60962645582.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5e56fe725384232ea405f1de7e8128d8/mipagawobijatipuloge.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/555ea511210d3e2df555cb8f98d3c7f3/negapo.pdfIn PDF document text
    • http://topas.lt/userfiles/file/33480432118.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d365041fe---fekizaxotativo.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3f3f1177253b18e5bc167c7b783ea8b/vepozarovuzipuw.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14087cdea3---14331977674.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607361391b9fc---21170725997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+skeeter+davis+real+namePDF 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_off0001161c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161C 17496 bytes
SHA-256: 21e842b86b4167b73567e806640e4e891d965fd9e3e025bb85727b2b67416335

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