Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83ace335999d407…

MALICIOUS

PDF

73.5 KB Created: 2021-02-05 23:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 64c57c0316257e8ff3b7b7b6240be377 SHA-1: 2235e9214088cdadca81f9ab34f1203957fa8817 SHA-256: f83ace335999d4074342954aa46f20c2d21497768818b19818df88010e4adc1f
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://seumenha.ru/wb?keyword=osrs%20ultimate%20ironman%20construction%20guide PDF link annotation
    • https://cdn.sqhk.co/kikolibub/LMjcvib/monster_truck_stunts_3d_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/xiaMhdq/superhero_creator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/djcFrUr/33947896751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fc9519dd3ca1.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/rokomumuvutuwopaf.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/7257570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5feb5f342aef6.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/boSxIF2/backyard_granny_pods_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/ggZns9B/nepimusoxixoniwisinixegi.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/duzobevaxut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_5fd1acb4b196d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412591/normal_60081c47300e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribaxekag.epizy.com/spongebob_running_away_meme_template.pdfIn PDF document text
    • http://kaderuzaxaje.rf.gd/bolero_of_fire_sheet_music.pdfIn PDF document text
    • http://pitidurafekuji.rf.gd/java_exception_handling_interview_questions.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_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 5288 bytes
SHA-256: 233d5f6122e0325e6a2cc94312bb1cd8995353f69e20b0e782c9dcba0f3bfc34
font_01_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 10756 bytes
SHA-256: b07c8b36473b3b645f30a8dcf4be98d20b21b8e11095627898c664acc4508441