Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a3604f5b0eb386…

MALICIOUS

PDF

83.2 KB Created: 2021-07-21 16:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9b988fec39ee838a0609108d069070d6 SHA-1: 3643305adbe805fb8b49222a99a26aab4ec9a10e SHA-256: 38a3604f5b0eb3868effb4c08276b933dd1a3c62aea7b549bae9dd2214c7b80f
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to various potentially compromised websites. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9647

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://brunsfamilyreunion.org/clients/e/e7/e70b0594429ddd28dfd4dd2f61c76e80/File/jopaleremawivomogubaxeke.pdf In PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/34585519654.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a26d81b87f8---dorenafexawegesujom.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/kowawop.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/zujonopel.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b775cdc460dd63ff746d67144b44bb87/14747255143.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/36899967122.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/lmk6tau3s9ntl30h6ptfi8bp3u/52605435195.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d8dede76e---58684394267.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f9cc35adab27d094f1aa3f3b5f258980/58461495362.pdfIn PDF document text
    • http://househouse.it/userfiles/files/74996934572.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/xijojumotuzapak.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/bofibojeneliziterapegofa.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f780050cc---ruvugemo.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862c84ae3df---bodibekulezo.pdfIn PDF document text
    • http://bociany.sk/media/file/zolidunuzewe.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8655970ed4---febosojowa.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f51917f404b---doxizeseke.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876d3ac6cb0---97701608721.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/51229037523.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083751bac0b7---vedaxanavug.pdfIn PDF document text
    • http://grupophi.es/uploads/files/12543613290.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/jovofoxapi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cefb25f1823---39867956107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=rude+british+place+namesPDF link annotation
    • 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_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 10944 bytes
SHA-256: 4dbcc78a909e8fddf2a4656340add67b8c933a79be98fb09400c5276881f1ae9
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 17004 bytes
SHA-256: 6eccb9f696fa61878f01ff0debd28254ba12bf25da65cc58f066c038f25677f1