Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c86957077e1b579…

MALICIOUS

PDF

73.1 KB Created: 2021-03-29 01:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08eab1e672258a2fda642bb43381428e SHA-1: 8116dfdc01cd72209d66b0bc5d38d3dcdb0d6de4 SHA-256: 4c86957077e1b57970f8181566177749940ed284350f81eec47bc3a17af7c484
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing. The PDF structure and embedded URI heuristic confirm the presence of a link designed to lead the user to a malicious resource.

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://zajinet.ru/award?keyword=assessment+rubrics+for+teachers+pdf
    • https://cdn.sqhk.co/bubiwalifeda/g5xOR72/td_auto_insurance_alberta_phone_number.pdf
    • https://cdn.sqhk.co/momebuman/pigWjcd/world_war_2_books_fiction.pdf
    • https://cdn.sqhk.co/gobumavurob/Ydhh7ji/christmas_runaway_bride_2019.pdf
    • https://cdn.sqhk.co/kibutonap/gf8hcwY/91136474291.pdf
    • https://cdn.sqhk.co/dasofuduveje/ijhXjav/anonymous_texting_app_for_android_phone.pdf
    • https://cdn.sqhk.co/walamalesumi/ghRlyhh/television_series_quiz_questions.pdf
    • https://cdn.sqhk.co/fiduzosi/hbPgi5o/tumeroritasofulufob.pdf
    • https://cdn.sqhk.co/rufosopufu/Pjhxhf3/gupedajovogokazibopujip.pdf
    • https://cdn.sqhk.co/valujoper/ifpMw57/41655522385.pdf
    • https://cdn-cms.f-static.net/uploads/4490516/normal_6060f46517274.pdf
    • https://cdn.sqhk.co/pijajawopoji/iakdMhh/92015161859.pdf
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fc93f217838c.pdf
    • https://cdn-cms.f-static.net/uploads/4470841/normal_603db3ea96625.pdf
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5fc6a73ee9ffd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a60e0c7-083d-4b30-adfb-eaf0af05b649/how_to_connect_hp_officejet_pro_8600_plus_to_wifi.pdf
    • https://s3.amazonaws.com/numegubowalonan/font_aksara_sunda_untuk_pc.pdf
    • https://s3.amazonaws.com/zozofufulolig/pelog.pdf
    • https://s3.amazonaws.com/dejazuvorira/driver_bematech_rc-_8300.pdf
    • https://uploads.strikinglycdn.com/files/e39a1faa-7b43-4b37-b365-6d1f3434e5bc/te_amo_con_todo_mi_corazon_translation_in_italian.pdf
    • https://uploads.strikinglycdn.com/files/092cd20a-e515-4ea8-adb4-39ba57394487/bizhub_c224e_waste_toner_full.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_off0000e20c.bin
e0709e086ce8d0d9d8f2b619324f05794cb315c23dc5cf1a21f4a05d943ae913
pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5492 bytes
font_01_sfnt_off0000f48b.bin
15d7dac172a67051c8ee99ca575c6fba0e4cf1da6b9a9342839a37b736cdbf76
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 10208 bytes