Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b44f25f112a2c0…

MALICIOUS

PDF

75.7 KB Created: 2021-02-14 02:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cf9ca2549d213153155dca7194e4f203 SHA-1: 40a052bb6d5187d231c2919e9e7d913d60a6b1c2 SHA-256: 81b44f25f112a2c0aed90ff804dd8c4d3bd93a4afb118b5c4b904845a3b291a9
126 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
  • 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.
  • 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://bologen.ru/123?utm_term=drastic+3ds+emulator+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/tinukomafiro/eebijgh/microsoft_news_articles.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/ajfLjh1/32774907701.pdfIn PDF document text
    • http://vuvuga.xyz/maquinas_electricas_guru_descargarad28v.pdfIn PDF document text
    • http://setlyb.online/soxatujepibufep4c1qe.pdfIn PDF document text
    • http://bestsalestoday.xyz/proprits_nergtiques_des_pierres_et_des_cristauxfbhxi.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/hicgh0a/sudoku_solver_algorithm_without_backtracking.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/ijgiHhb/3534464785.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/Dgdjjgd/dobepabenuwiduj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavavoju.rf.gd/88436462802.pdfIn PDF document text
    • http://filopisexufage.epizy.com/four_play_fallout_4_guide.pdfIn PDF document text
    • http://siwinigap.epizy.com/chromecast_tv_streaming_device_by_google_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/34391039089.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/87719633525.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/bhoot_fm_18_october_2019_free.pdfIn PDF document text
    • http://fezaxakanopejux.epizy.com/vutulijukisilavuziw.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_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 5620 bytes
SHA-256: f90240335970be259a4c5f6cc6587dc17e07f50ec78c2481903c5ff41a5deedb
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 11436 bytes
SHA-256: 09efd73dcdd3e3e3c025eb79c7009f754b956e2bc2a93ce17d82b3f3ea3e20d2