Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ea0eb306d588ae…

MALICIOUS

PDF

60.0 KB Created: 2021-09-15 13:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb9d5190b87398bdc61a5e815b028b69 SHA-1: 04c51e0be3d2e11eb46ffaf105bde6331a2c8b69 SHA-256: b6ea0eb306d588ae412695a0954ba702649f8198c3cf656ef8f77068ea935860
124 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, many of which are structured as link farms or disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure and the presence of external URIs suggest it's intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8037

Heuristics 4

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=algoritmos+de+programacion+pdf PDF link annotation
    • https://sanmuabancongty.vn/images/content/files/mufapofazedujowomuj.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/fisapewuviminituzazomataz.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/gadarokujupavawew.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/62293981694.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/3611765335.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/89877216998.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/51487738366.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/vakezasutubelenuwake.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/5997525732.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/wakovorurujulejafana.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/7ebaacd80d8585e1365893b221f4dff5/rovaxojivi.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/27602963864.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/4996a6bd9541bf0521323a8c975be62b/belogatibasorigixofinawe.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/fimarafiwajavumam.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/25300918099.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/xilesirusifi.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/kezigedesaboviw.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/genanegikokalimaxunane.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/80483326613.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/kigijag.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/11911176204.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/sumeruwaxajatefenevoj.pdfIn PDF document text
    • 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_off0000cc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC75 10944 bytes
SHA-256: 07c6e8cfad04c13f005185676d415416c3211c8ce813e215ebfaff05352a0205