Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a27d812930b360a…

MALICIOUS

PDF

147.8 KB Created: 2021-03-18 10:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ad41b81efc816163682f0081a9515bd SHA-1: 16bba85f2b18dd7d640a6d64414cd309fb5e682d SHA-256: 5a27d812930b360a97fec1024989ed681c09002520e4498809b8b147a8b2d123
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains multiple embedded URLs, with the primary one being https://kuzutuzo.ru/wix?keyword=brewing+classic+styles+pdf+espa%25C3%25B1ol, suggesting a phishing or malware distribution attempt. The presence of these external links indicates an effort to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://kuzutuzo.ru/wix?keyword=brewing+classic+styles+pdf+espa%25C3%25B1ol
    • https://cdn-cms.f-static.net/uploads/4379974/normal_600cb474a3d3a.pdf
    • http://brumbum2.xyz/how_to_graph_velocity_vs_time_from_position_vs_time5fykd.pdf
    • http://resimpub.com/business_correspondence_letters_faxes_and_memoso8mm3.pdf
    • http://hotita.fun/como_puedo_buscar_mi_iphone_desde_androidkxjpl.pdf
    • https://cdn-cms.f-static.net/uploads/4390373/normal_603f0ea39d4fd.pdf
    • https://static.s123-cdn-static.com/uploads/4426941/normal_5fce2f249cb47.pdf
    • http://infonewstravel.com/siren_head_free_gameplay7mh1d.pdf
    • http://trudogoliya.online/billie_eilish_wallpaper_cartoonpuaxs.pdf
    • https://cdn.sqhk.co/tokititagiwe/iaciije/ai_chatbot_python_tensorflow.pdf
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5fdaa91649aab.pdf
    • http://winoraama.space/uber_driver_insurance_requirements_floridaepkbi.pdf
    • http://zootime.store/samsung_rs261mdrs_owners_manual8il8v.pdf
    • https://cdn.sqhk.co/wadusazilox/jh9pdjh/42253400952.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nozuwodapa.epizy.com/3495022417.pdf
    • http://xuxixezatazifax.epizy.com/complications_atul_gawande_summary.pdf
    • http://joxuritodapeni.epizy.com/2308194724.pdf
    • http://sapakebozo.rf.gd/batatorazemowovone.pdf
    • http://verafewema.rf.gd/89504850588.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fd8f.bin
c54260a4d84b2fe72a6b26a1f805ffe7304424330409885a0b88ed46ba2c8347
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD8F 5780 bytes
font_01_sfnt_off0002112b.bin
c0fbbe6408a57352530307d4d81db09fba36bb37064d8fc0dc7781fd88776abb
pdf-font-stream PDF embedded font (sfnt) at offset 0x2112B 14840 bytes