Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98ef5e91a836802…

MALICIOUS

PDF

84.6 KB Created: 2021-04-02 13:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2122a5f72a07cc75a5d0275f2b2ac81 SHA-1: 79688aa444d2ebc08a8cbac9f885c831ae252bf9 SHA-256: e98ef5e91a836802583e1d53aadc48834519f77b6adfc1575a9cb1890e6d0219
154 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The heuristic firings reveal it contains a large number of external links, suggesting a link farm designed to redirect users to various potentially harmful sites. The primary malicious URL identified is vilenefex.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7908

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=la+pla%25C3%25A7a+del+diamante+resumen+rincon+del+vago
    • https://cdn.sqhk.co/bizewavaxug/eBiePWW/critical_thinking_sample_test_with_answers.pdf
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/levobamamivububaxuri.pdf
    • https://kunaxujo.weebly.com/uploads/1/3/1/4/131406864/9482966.pdf
    • https://gufonesugoxemi.weebly.com/uploads/1/3/5/9/135960051/kisijez.pdf
    • https://cdn-cms.f-static.net/uploads/4470218/normal_605669160b7ac.pdf
    • https://fixafaren.weebly.com/uploads/1/3/0/7/130738550/475d894ad49e91.pdf
    • http://comp-arenda.site/rokaxitixibudolabaj4.pdf
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/torodo_pugefasiniboxex.pdf
    • http://vanlit.ru/pebuwovivuxalqk1cv.pdf
    • https://cdn.sqhk.co/ratevusur/gjjdy1J/indycar_schedule_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4374002/normal_6033a0f4b7c80.pdf
    • https://cdn.sqhk.co/woxemumi/7Vibiga/modern_love_stories_tv_show.pdf
    • http://zoneeuro.pro/naxajobx8gj.pdf
    • https://lifunakejeka.weebly.com/uploads/1/3/4/3/134358873/7134026.pdf
    • https://cdn.sqhk.co/dukosisevu/giohfBK/50380698911.pdf
    • https://cdn.sqhk.co/pulafefer/jifNgfA/nulomifojarazasij.pdf
    • https://vezajufarazigur.weebly.com/uploads/1/3/4/2/134265717/4821f3b6d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/69fc86ae-1af2-48b0-b863-e936b252ad6e/how_to_check_transmission_when_buying_used_car.pdf
    • https://uploads.strikinglycdn.com/files/e8b26d99-cdd7-406d-8096-3809e70620c7/69127968613.pdf
    • https://uploads.strikinglycdn.com/files/8f37c06b-d38d-4fc7-9a38-d1b583ac78a8/tablas_de_medidas_de_pulgadas_a_centimetros.pdf
    • https://uploads.strikinglycdn.com/files/fa4bdc31-2d34-497e-97e6-d42dfb3bf04a/rita_mulcahy_pmp_exam_prep_10th_edition_ebook.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131bd.bin
235fabe200cd2d0671447cbafc694c826e6bcb6beacbd70e4811da66cf96fce4
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BD 5576 bytes