Malicious PDF — malware analysis report

Static analysis result for SHA-256 c865bb9351db7a0e…

MALICIOUS

PDF

78.2 KB Created: 2021-09-21 20:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ba02680e69bd2deb0d900fd86932e206 SHA-1: f0da90f1da5ab014e208bf179686012d4afdc463 SHA-256: c865bb9351db7a0eada81c540cbe1518ab6505681e327351cdcd91ed41c594b1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are characteristic of phishing campaigns that often leverage such redirects to deliver malicious content or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7801

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=pikachu+pokemon+mystery+dungeon PDF link annotation
    • https://securincasso-online.nl/ckfinder/userfiles/files/79177332705.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/84405454906.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/bamojamugudemaf.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109160757162298.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/22099822524.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/19749953189.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/87249172603.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/fifelinidexubogut.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/bomeladagufitazufedab.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/10889629582.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/20667648801.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/lerugosibonixazejaka.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/82480760815.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/zamizil.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/jebanenoral.pdfIn PDF document text
    • http://tochalco.com/uploads/files/sexazefagetowixupali.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148954e12b9f---vadapomujujamuv.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/95547221849.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/fesemilore.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68812996092.pdfIn PDF document text
    • http://sql110.com/pic/88001005039.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161443a2ebe2a9---86921750673.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/pakojurex.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/95122862547.pdfIn PDF document text
    • 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_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 19276 bytes
SHA-256: 4092d061760fcfe0cd3174cba950a6cca06667793202699c9d7dcb201ce5185c
font_01_sfnt_off00010b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12368 11224 bytes
SHA-256: 7787cf5394271c8a352b144d0ba1b41b1f275d7adf2f64fafd2899712ae29705

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