Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1c3bc99c879733…

MALICIOUS

PDF

68.2 KB Created: 2021-02-09 11:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2925d3a4e2e6bf147c4ea16eee8cf900 SHA-1: dffa989ffa15d80f355ad688ba00417c8f89f362 SHA-256: 5a1c3bc99c87973385569f18c09782ee55423e790637aa4d7458d582a6e662a5
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://jacksth.ru/wb?keyword=plastic%20sheet%20suppliers%20melbourne PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5fd9c5147bc8b.pdfIn PDF document text
    • http://nashremont.site/jekoxozekikevush1m0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5ffcac581694d.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/9692960be749f75.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/aVOgchi/xoxoz.pdfIn PDF document text
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/dagixuxotutonol.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/91cbad5943.pdfIn PDF document text
    • http://dnepr24.info/be_at_one_menueupsq.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/jijeggp/pefimonorewozowuloxezu.pdfIn PDF document text
    • http://bio-ita.fun/fuxodavenzmob.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/dutimajizowa/tuvisiliregisalo.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/62747270659.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/naa_autograph_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/kefabure.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/26251552665.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_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 5312 bytes
SHA-256: 5e5a90a53a927e43c505623ab620a900c8fc35765fe670e37755844908854bd4
font_01_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 10624 bytes
SHA-256: cdb709ba2c5b581e53a2ffc358349efff3e8c32b882b233685170c097ce4a889