Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdbd7041ebbfe10…

MALICIOUS

PDF

66.0 KB Created: 2021-03-02 02:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 26cf724edf6765dd4b077c308902bc3c SHA-1: 3d75f204ed101daeda5ee09f9bed8abe535292e3 SHA-256: efdbd7041ebbfe1044ede7cb517431f6f258d821489d8cf68a1d63609fd22221
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://jacksth.ru/award?keyword=how+to+make+a+dice+tower+out+of+cardboard PDF link annotation
    • https://cdn.sqhk.co/jidulopavoji/bgfhbid/dr_driving_unlimited_mod_apk_download.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/xalebi.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/auUMkji/ahly_zamalek_6-_1.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/LgdiaNl/98033478169.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/exo_terra_terrarium_lock_instructionsw9pqj.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/helniwA/bow_shooting_games_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/wHxhaBg/hd_space_wallpapers_nasa.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/nugerutajasapi-sefeg.pdfIn PDF document text
    • http://trokot-shtorki.online/boiling_point_road_to_hell_iso5w689.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/Hu8wgiJ/suluvepidebalejijegibekot.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/bejeseja/ayyappa_swamy_bhajans_patalu.pdfIn PDF document text
    • http://pujumek.myartsonline.com/comparing_and_contrasting_mitosis_and_meiosis_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/free_hd_movies_online_without_membership.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/are_moen_shower_heads_interchangeable.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/bare_faced_messiah_free.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_off0000c928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC928 5212 bytes
SHA-256: 8473b127031f9e8745127339cc522ae8650a7faea18c6fd80577b7d8c5968a55
font_01_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 9440 bytes
SHA-256: 4828170d8c07cabb37f91e21ee55110088405c001008e4eebed442d0883ba563