Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae15979dc722378…

MALICIOUS

PDF

69.5 KB Created: 2021-05-06 22:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05bb961834470bd3bb492c736daeeb2f SHA-1: 6c0e058446a012d93cfc7d350c62df31d049b685 SHA-256: eae15979dc72237888e887806fb6af14c01dab677e22496e8815be46853b81de
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing sites, aiming to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7739

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 https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7d870b941---wikununiposilotetotuja.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/54048f47915c130747e0e7d3929d548a/wekubepilegule.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4db7dd768---14807735952.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/68ba2e71f60c14b6e86be93564b38124/64420514666.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f4df94a88---83337547005.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/188fea236a6d067e6f6134c63312dfa4/dupusidefubadaderi.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084278d7f850---93485010822.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dta8ppo438jpue33qmgtkrt0ao/67220600492.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/e7ffce8c2ea9d399c2504d20b304ab73/badalalawaginib.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/212691c457478c38d5ca0bab18e8fbee/mokamedakapozonatipo.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b7d8cc69e---35251495232.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a48be86a3---12763997465.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160835ff4e6ce2---sewokoxodomokefedirifi.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/7e1cf6769d60fef93920536ebca3f4c1/70536324500.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/12622e9641144735cc824f06b656c9c4/ruwamik.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1e94f1642---mugiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=bombo+radyo+iloilo+reporters
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe9.bin
d12ab135617f498ef86ef4f61d36c3bffdccbff98bce4ca2f8df79b278ed7720		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 5080 bytes
font_01_sfnt_off0000f128.bin
4198848020da4d34e63284c41b6b6951e70bbb1164f11149950ceeb2462157c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10824 bytes

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