Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c7ed74b61dde0e…

MALICIOUS

PDF

72.1 KB Created: 2021-09-28 09:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3eca0d41148c236e450ade1a7c290678 SHA-1: d464d8777e410d46e87b66424b926a846af39eb1 SHA-256: 96c7ed74b61dde0eec11d7e42036b124d88b2c1e42b123481324b6155097aa6c
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple domains, several of which appear to be compromised or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is likely a phishing or trojan delivery mechanism. The embedded URLs are designed to lure users into clicking through to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

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 http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d324c21dcaa2d9d78a94df50d310c0cf/vasuwovezad.pdf In PDF document text
    • http://secureyun.cn/uploadfile/file///2021091000360848.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/13459149216.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/wopetinufugevu.pdfIn PDF document text
    • http://korytnica.net/data/files/68798148290.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/gasewiwijuxosoxu.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/61688861660.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/41717279073.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/34499503038.pdfIn PDF document text
    • http://schubert-hh.de/image/file/24811012854.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/dca32546eadcaa196acfe03435b26f8a/49155686159.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b487ed12f5---fovasapowi.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/60259835668.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/65272537327.pdfIn PDF document text
    • https://asken.as/bilder/file/tuxedamogi.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/bufapedofu.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/xototirupavitimi.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/40085750671.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/80016976385.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/gekomigakijusonuvoji.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/56878995232.pdfIn PDF document text
    • https://sanidom.pl/img/file/34861874068.pdfIn PDF document text
    • http://thaiurethane.com/userfiles/file/14642672572.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/mosojujotogifod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rakugaki+ar+android+apkPDF 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_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 10360 bytes
SHA-256: a552aabc73a3b2d105522e91af0ec4c9209729d205f64d0a60bebc90586339e8
font_01_sfnt_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 21048 bytes
SHA-256: c12a5382403d5c3d61c21f1249e101e8e07f87b1fd64d970a5f4d32655d343de

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