Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f64a5c379c7328…

MALICIOUS

PDF

93.7 KB Created: 2021-10-13 02:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 426b50631a329794efef99e65b0400c8 SHA-1: 0559ab9aaea781cb69f1deb8b09e0a5f5a992817 SHA-256: 65f64a5c379c7328af35be8667e6e7a0ec8975f13d5bf61d566ef3f3081be686
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or spam campaign aiming to redirect users to potentially malicious sites. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6053

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1412c3cc4cd84e63fe5635f70c73241e/35308451811.pdf In PDF document text
    • http://vsevolozhsk.mebel18.com/uploads/files/setinanazafaxamanov.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/wenakanilebekopo.pdfIn PDF document text
    • http://mounceconstruction.com/userfiles/file/nejokorojekikaja.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/livelofazudab.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210910_200206.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/8812203979.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/wadexomexojasap.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/8299106604.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/27700207218.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/rodemimoperidepuze.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/robokoseg.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154227f60f4d---88321732154.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/37003817615.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/95341970608.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/23082470040.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/selekego.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/92758752341.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/gisodoma.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/xijorezibogajopu.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/1616631533.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/xugelimukamegagajosetix.pdfIn PDF document text
    • http://air-ned.com/uploads/files/datonagesimapol.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/69788509899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/EqozwcbAC44/uplcv?utm_term=born+to+hellPDF 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_off00013277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A89 21032 bytes
SHA-256: 8f9f08c9f4efd6c816479a8c96717fca44440efb5d22ebf1ecb408f28e59b5cf