Malicious PDF — malware analysis report

Static analysis result for SHA-256 8895d48c44ea8dc5…

MALICIOUS

PDF

72.5 KB Created: 2021-03-05 01:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8dc4113f8d74abf500705d0f35e7fe87 SHA-1: 69826117b439d2a5f6cfc746ec4884c496229f32 SHA-256: 8895d48c44ea8dc5ab38c5da649a7f4542a2606d80e909eb0c458235c37c8e8e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=workplace+diversity+leads+to+innovation In PDF document text
    • http://valuburikodajad.medianewsonline.com/how_to_treat_periodontal_gum_disease_at_home.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/fajesakuka.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/lotog-xiligakazoraf-farul-vifutefagoj.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/baxolopafadewadax.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/24911601667.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/mefevigifikasagagono.pdfIn PDF document text
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/7658538.pdfIn PDF document text
    • http://watogoda.mypressonline.com/couples_therapy_exercises.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/how_to_clean_filter_on_arctic_king_portable_air_conditioner.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/cat_eye_velo_5_not_working.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/folatikejikoni.pdfIn PDF document text
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/7132378.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/rurovikejigibu/don_t_say_alvida_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/zajawukolulageze.pdfIn PDF document text
    • http://pokowowusi.rf.gd/95689634750.pdfIn PDF document text
    • http://widusop.atwebpages.com/what_is_the_advantage_of_k_to_12_curriculum.pdfIn PDF document text
    • http://buzurofomurab.rf.gd/facebook_insights_to_google_sheets.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/why_was_the_second_agricultural_revolution_important.pdfIn PDF document text
    • http://limazajot.rf.gd/11337484835.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_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 5308 bytes
SHA-256: bc8ca3f23d0ce0e57244c846284ccf2c622e1de4167522ed32d0786b0b21ffb6
font_01_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 9780 bytes
SHA-256: d745317ebee124b38727fd38a899f2fad9f8a499d72d6f5d0684374aed65850c