Malicious PDF — malware analysis report

Static analysis result for SHA-256 c491edee8c34bfcd…

MALICIOUS

PDF

66.6 KB Created: 2021-08-11 02:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: e99648c47ec87d6e10c500d9c90d6550 SHA-1: b7a7c3f93c093bcd28fa7882d2755a3fd742e79e SHA-256: c491edee8c34bfcdd7ee8939703f8adb2a4917f8ce6ce2540ab59c7f5563e6d0
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and other disposable hosting. This behaviour is characteristic of a link farm used to obscure malicious destinations or distribute phishing lures. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8885

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://rimsball.com/ckfinder/userfiles/files/39204666718.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb4d1283b9---fuwiwiwef.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/logulenidefeduvovenupet.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160830271a6dc7---jireromof.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090615d28579---19386389053.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/kjd761jjnc9nto0668amnqt6n4/zuvimubepujovegaketep.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/sunadanutuguk.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/27015818245.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f2d153759---rinelugeterulejexu.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/mevowamoraxanurupepaf.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b65b8c7edf351dd89f6612f91959a3dc/62699430201.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/36505071853.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/m1j1q90ja1d9g6141pvbolj4e7/valenison.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/viridijegebijawevusimem.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fafvp3q9dq4u4cnp0im97tq05/kugux.pdfIn PDF document text
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/velonelinevul.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/nozolopavidunisigebubife.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/12274901459.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d17a8a4bb---girapawowosemetixidifuv.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/63075663dac500046abc1dd304356cb4/bixunabijuper.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/wujofap.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/158c8583c762dd6aff61834c110e0a16/89332786026.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2g8egkvcqngk4ug8dhuenpn9b3/penekurovavefij.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/bb6427271568fd5f7d253bb5bc45102f/5758677214.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8j8mtsugje4gio0teci1p6sff4/wigojawadoferijonad.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080a0cba25b1---81531899875.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/81572979083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=john+w+creswell+research+design+4th+editionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 17712 bytes
SHA-256: 4d30c6dfd85e2cb49e4ad0347e68e81cf70496c3a4dc50859ea039e1bbffdf67