Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61b946a51634b59…

MALICIOUS

PDF

101.5 KB Created: 2021-08-06 05:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2582f17187dd5e12f85dc7375de9f65b SHA-1: 72b7fa33cfefecc1c059faf63d9011c1bbe7070f SHA-256: f61b946a51634b59822e218957bcb2afbb769716838ad2ae6d18945e342fa71e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to host or redirect to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6068

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://cafesezony.ru/fck_editor_files/files/75013565919.pdf In PDF document text
    • https://dmshospital.com/mm_engg/files/kuromekitiruwawewaguxep.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/rugefugotuniwuwelebatido.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/58b92ab74a2edbee369dfd2745116a08/pebikujebivilojokites.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ee7f8c54efdcab483009ba1c192e45d5/zejeleremoboxovu.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/54139350436.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af96e866e99---34647100623.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/26400604088.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/e830b401e6f4c70f1a8dab8138402d81/petifegixifupatum.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/topariboxeguwonamegifa.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/05/file/51639838858.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/redoxarakepara.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d34d27605b---vofodifemagolazunopad.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/68644089252.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae8e2c32d9---68095996484.pdfIn PDF document text
    • http://maxbrio.kr/files/files/taxepurugipugomawefov.pdfIn PDF document text
    • http://com123.vn/uploads/file/36411264534.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/ladeg.pdfIn PDF document text
    • http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/gemisuk.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c83ab5135cc4c63fa34ae1976f03de02/20273454585.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/q7vrj6lrjqealdem6klv2qrqme/nulep.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/nedagerinotisulavan.pdfIn PDF document text
    • https://noventa.cz/media/files/file/zunulel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=notario+paseo+de+gracia+118PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/903b76e60f78ad9c3977136a7aaaa007/jomapenasawukupov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000150e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E5 17896 bytes
SHA-256: b3d9158f6d771321c766bf544455aeb6f0ebd617abbd6e238dcd70f3d56d32f4
font_01_sfnt_off00017ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.