Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd5af6efb987c01…

MALICIOUS

PDF

80.2 KB Created: 2021-01-08 09:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c143252def3e4b1f0cd3ea44a1d63d04 SHA-1: 8ea8b5cf9bffee635501a3e2b617bced5a0bf6af SHA-256: 5fd5af6efb987c01a22537e8c823bb0e3362f2183fe48d292fe7560ff5db52b9
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The document contains an embedded URL that appears to be a lure, disguised as a search result for 'bishop vaughan school uniform'. This URL likely leads to a phishing page or a download of further malicious 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://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://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

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
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 11464 bytes
SHA-256: 6939348f204b91f22e3a0c881734a9925cbb56b572c16cee1bea44cd65a2d47b