Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0693849d7a5072a…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 21:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3698f6571c2554119d01313381a0d356 SHA-1: 7979bc10cd905c81b266031c59bbc12025709d92 SHA-256: c0693849d7a5072a879c68d44af823440efd6000c7a526838ade49f5fda4f86a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://malagi.pl/user-files/fck/file/21035161192.pdf In PDF document text
    • http://pileki.com/imgup/file/xitokefate.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d313352f4f---35010109714.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3gi2mu85qd8iotq2ni9fa3a2d3/xukarunerefanumepaniw.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/90666086337.pdfIn PDF document text
    • https://chungangroup.com/uploads/files/202109240109421053.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/44242494621.pdfIn PDF document text
    • https://tessuno.com/upload/files/614c62247607a.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/kavewir.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/76949261492.pdfIn PDF document text
    • http://maksimetall.ru/files/bipefenelupala.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161432615c7df9---buxitabud.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/36489685751.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210915204125.pdfIn PDF document text
    • http://www.agot.pl/upload/file/61222878296.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/tewuzosuvaw.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377c754c990---lafifatojom.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/bamidezem.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/wupadaxolosuv.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/eb423118df013c03e8504673cf4845cc/18359405575.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/fidogobakamaguva.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148ae3a3e598---77571664575.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/51138015985.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491fb983cd3---65386298649.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/mopapinexidopefezutopulat.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/11960123709.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/gh1c212bn4ldb43egc38uee3u4/digotanifazuxozebarivum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=teleport+hack+minecraftPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000b4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B5 10632 bytes
SHA-256: 5e7e6e83e2b2727f06da3666caf2796be0fd9c60de2b39572684b9cd9b3dc5ba
font_01_sfnt_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 14352 bytes
SHA-256: 2281cefa1e3365276f9d27fb18043109fdedb82347132e0654e422db612511e1

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