Malicious PDF — malware analysis report

Static analysis result for SHA-256 6842c7796636ad0a…

MALICIOUS

PDF

65.5 KB Created: 2021-02-05 23:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ac5dc2865ef44fcfe9b980494de6ba08 SHA-1: a37e8c48d7beac170a8bc53ed8b48ab060369454 SHA-256: 6842c7796636ad0aaeb90defc76d1c67b33e19b228bd4adbceb43b0226e535f5
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=affect%20effect%20worksheet%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470017/normal_5fe2ec6e6591d.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/RZKWigk/how_to_make_origami_animals_with_sticky_notes.pdfIn PDF document text
    • http://istlan.fun/jekawomenameliraxisukoded51kn1.pdfIn PDF document text
    • http://socialwave.me/6734642406314c7j.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/g1ghJic/minecraft_worldedit_download_1._8._9.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/jizFjfw/starlight_football_management_lagos.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/jbjgkic/98881918763.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/fhjhjWK/75286169740.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/cuhbCgg/88611886217.pdfIn PDF document text
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/6770132.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/ghJwncu/idle_games_like_realm_grinder.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/chfd6gi/5485480240.pdfIn PDF document text
    • http://rrrrkkkkk.space/vozosenakamokozimiu28i4.pdfIn PDF document text
    • http://keepxufi.space/621099123057n0w7.pdfIn PDF document text
    • https://vobudogekatobef.weebly.com/uploads/1/3/0/8/130874620/684197.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/mivokozibu/obstructive_sleep_apnea_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/kubeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/landslides_causes_and_effects_prevention.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_off0000c61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61D 5144 bytes
SHA-256: c57c42c818323693ef31f236deb9a1450f16398ce3b7d9ebc4e8569665824231
font_01_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 9816 bytes
SHA-256: 680dfcc18c04e33bfc8007f58876ca2ccb24f7c632c9b58fd09458379285cd0b

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