Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ffc79228bd9cc9…

MALICIOUS

PDF

72.6 KB Created: 2021-03-03 01:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f00f4a68e2f74ce2855f3def35502a8a SHA-1: 68c2079e88f916f95d521493cf16c6fdd4330601 SHA-256: b5ffc79228bd9cc9b50fbb6ec0d6a2be3227800b297d4eb59956eb704c192617
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/award?keyword=online+flowchart+creation In PDF document text
    • http://jasazotinalol.mygamesonline.org/corsair_gaming_k95_rgb_platinum_cherry_mx_brown_review.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/59603878073.pdfIn PDF document text
    • http://bonusiotsbera.online/mepevafawemaserusosasilamre82r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484154/normal_5fdcf44ae39dc.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/hghbyi6/the_seven_deadly_sins_grand_cross_download_ios.pdfIn PDF document text
    • http://keepqifi.site/479370122871ue4r.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/stihl_ms310_years_made.pdfIn PDF document text
    • http://espaceabonnes.com/jovasimadavomaduwv79u4.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/15_logical_fallacies4up90.pdfIn PDF document text
    • http://serebirupa.iblogger.org/where_is_the_reset_button_on_a_husky_air_compressor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375355/normal_6002e556b7a26.pdfIn PDF document text
    • http://xepusuxewo.iblogger.org/16631098929.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/Dhdjjef/snowflake_ipo_stock.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waxaravibew.epizy.com/chocolate_songs_pagalworld.pdfIn PDF document text
    • http://tasaroje.epizy.com/karcher_electric_pressure_washer_motor_not_working.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 4908 bytes
SHA-256: 3271ff5b806b83b63d86daa44279dfa170a96fe4fd30b70ae5df18788c07b281
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 10296 bytes
SHA-256: 6f6d2337a666db0853d5e723eec5437ef429931fa533c01b5721c26d3ce899f8