Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c9538f482b5cb2…

MALICIOUS

PDF

67.6 KB Created: 2021-01-08 09:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e025dcdd79428ab83dbd0ec130ffb18c SHA-1: e373df95ab52ad5234f69ed32e2e5ccdee7277a1 SHA-256: 43c9538f482b5cb2bbfb6d261be75df1f4cb3e16bac6bbdea0beffdc381b50c4
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. An embedded URI points to 'trafffe.ru', a domain often associated with phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9541

Heuristics 3

  • 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
  • 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://trafffe.ru/aws?utm_term=bishop+vaughan+school+uniform PDF link annotation
    • https://cdn.sqhk.co/regomesu/Jibgefb/36257185835.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/sjcCXif/world_war_z_game_steam_release.pdfIn PDF document text
    • https://cdn.sqhk.co/talulofofexa/0f4IAvH/screen_recorder_app_for_windows_10_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xotomisen/viva_video_editor_pro_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/48283869750.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/vitufuwomunesawiki.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/psx_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783fd042-b33c-4120-9fe0-046b867017f5/52453737684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0246e6-5052-46fc-8edd-70da31af15b6/wojiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc80bc5f-870f-453b-9a15-7caf0e95be7f/how_to_insert_video_into_google_slides_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e48c912-e086-419f-bee6-55a511c074ee/gisinirefajalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37abf9a0-125d-45db-ada5-bcdfae2ee83d/jitaxamevebop.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5536 bytes
SHA-256: 5903a28b5023484cb2bcf006c03ab575d2ccc346646730801a433a779131c81b

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