Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0e962b3fefb4dc…

MALICIOUS

PDF

71.7 KB Created: 2021-09-04 00:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9c7378a6fb9e04030ba59e3075d2430a SHA-1: 891436ceec25d5d2cbc867ea85f1dfed59d885a3 SHA-256: 2a0e962b3fefb4dc87e5f5b8e23174abf8f5f6a18e48c3fb940ebdc19ea3e46f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to numerous PDF files hosted on various domains, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://digicpictures.com/downloads/pulimuxagetufedavaraxuxep.pdf In PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/55fqhlgvlqcfln43kfjgl2s75t/xezorezejorekipopuxopo.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/dadotovozubalipulaxolade.pdfIn PDF document text
    • http://btfa.tw/upload/files/41720885989.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd5c04cf3---nazanuta.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/dokadekagazadafulinogij.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/72365876136.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a7095494426d27dfd474ddf3831ec1c4/lulifakotebepezukug.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/nosudujipekurafuradilotul.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/madolijogeboragojowuzogan.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160db5681dcfd0---83647336550.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160741cd1a4dde---23440750663.pdfIn PDF document text
    • https://aedwea.com/upload/foto/wizosirexujusaneve.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/8349879025.pdfIn PDF document text
    • https://asiapharma.la/files/files/giguz.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/66480750034.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c385e253aa6---19599969489.pdfIn PDF document text
    • https://hssanesteban.cl/files/59574452104.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210701_46E9621B42A6F748.pdfIn PDF document text
    • http://mcgrathpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fupat.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/14775259069.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098a27f71826---78009851363.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/79517758372.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/fajakip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=physical+chemistry+atkins+solutions+pdfPDF link annotation
    • 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_off0000c7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 17032 bytes
SHA-256: d1873f8226e539c6baa545222688bfb34fbcf21b2678633a3af2d14fa2d0e476
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 11192 bytes
SHA-256: fcd2ee99666190a26e3ab4612da3d7bc6316f6399070fef9473f4a1d02f7fb60

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