Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf1fa27a6088b92…

MALICIOUS

PDF

71.4 KB Created: 2021-02-15 12:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 77f2a0a0edccac878184a1d76ab46efd SHA-1: 1c1e21c8be80298bfdbc840270ae8688917cb6df SHA-256: bcf1fa27a6088b92b7414df9fb46b17e99ef17a849a7401da2161da7e88628fc
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wix?keyword=ef13+muscle+supplement PDF link annotation
    • https://cdn.sqhk.co/jimumakevaji/jd9hbjc/93219941144.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/iijjfYm/zixafup.pdfIn PDF document text
    • http://luminar4-download.xyz/9204955851511t2o.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/ficy6lO/keforituwofobunigogete.pdfIn PDF document text
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/nakexojuwepoje.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ivkNqk0/41453063572.pdfIn PDF document text
    • http://zubiki.top/lord_woolf_final_reportq0p09.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/kusipa.pdfIn PDF document text
    • http://dvestideyli.xyz/575606820167uotx.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/jQgcqBu/tuzavefaxoba.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/901721.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/5ec65cfb39ac8c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/Ugg9Boe/open_houses_today_middletown_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/9gghah0/sputnik_movie_rating.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/XuO7rjc/justin_timberlake_song_friends_with_benefits.pdfIn PDF document text
    • http://uabiomanix.xyz/41008678995wu25w.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/xhgjdn6/julajonesofomegadojupukit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wemubivoparuf.epizy.com/transformador_binario_a_texto.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_off0000db3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3D 5028 bytes
SHA-256: 528f3023d6c77985d726d27b22a93b738de9e01235449a84e7d02cc383b2bdb9
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 10560 bytes
SHA-256: 55bfd3db16832466db746fe83f515ed77041fd3bd3c10c1cff26d248735ed176

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