Malicious PDF — malware analysis report

Static analysis result for SHA-256 463869481d4f7114…

MALICIOUS

PDF

75.3 KB Created: 2021-08-25 10:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f7f890d3e8b4efdb70440d993d02fca5 SHA-1: 8ead6acba78c47d2a3fea0d5bce4e85d6f82bc01 SHA-256: 463869481d4f7114f63453cd9e20b3bc449c4031d9eddffe8cb51b54a4cc2c14
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2901

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 https://alakharia.com/public_html/userfiles/file/21175342166.pdf In PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/nmr5b2n53fvcfup8r5dv1ludso/mexokipevula.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/nemixoliwifibu.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/bizatedabivomewixikadari.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/mibonupor.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/pabalulutofawunib.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/33f538be3f2e6dc76d00775fcd5e83f1/93520718743.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/elc477f85uvf9vcspae5keq6f5/45508806767.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/65767529939.pdfIn PDF document text
    • http://amdind.com/userfiles/file/nasonobigasebiwavobojinu.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ljud7ufugn5bm5gu84hs85rqeo/tumogigamir.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/nugogaralagadomefowi.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/faxovutefesejibusigi.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/lowilivorawakojaxelul.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099787a678f8---45341247858.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bd1d9a5f06---47591195381.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/situdurikojorivejijotope.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/ebb6b2e55d77a78c9d5ad81b60cda851/15157368270.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/85728084813.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/stigsa4ukkgsok2gj2v7of8ol5/32168934462.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/powopotefawibeve.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/54655662648.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/viket.pdfIn PDF document text
    • https://digireg.at/upload/feduvibiveguda.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ab5e39649ebf5635906802ab10a6236a/36978681598.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/7572b3m14801s0knvqued02gvg/xugidazunabuzojomabat.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/g5m3tt0pr7r5b02fd09rk0ago2/7470886918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ace+inhibitor+cough+treatmentPDF 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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 18116 bytes
SHA-256: 2831c00841d28b9a8be72651c99d1e31c57f8ef324d7c7d827a11570f1198b72
font_01_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 10684 bytes
SHA-256: 8e86c6a4a2c5623da6ffeaed56fd3cd7628a0b8fd7c915e4395952cae4e30759