Malicious PDF — malware analysis report

Static analysis result for SHA-256 0435849130375444…

MALICIOUS

PDF

65.6 KB Created: 2021-03-02 13:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: efd02509627cabd46dc04fb907861ce7 SHA-1: 36ff2fef82c1846c0115d87cade713319acb6d2d SHA-256: 0435849130375444316d67d6f029d52b804dd8200c6bfa5b88dd74145073c659
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=mechanical+engineering+design+shigley+10th+edition+solutions+pdf+chapter+5 PDF link annotation
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/4516974.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/jb9hbji/30900278242.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Sie0jcU/guxibi.pdfIn PDF document text
    • http://natlab.ru/defalonixenaserozivuvind54zt.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/jggfSjg/taxuxosuxazezedoxojaner.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/Y8ONVih/puffin_web_browser_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/66O0iaH/bomber_arena_bomb_with_friends_throw.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/sikuborol.pdfIn PDF document text
    • http://ukranews.site/the_misfit_of_demon_king_academy_anime_ep_12ub9ok.pdfIn PDF document text
    • https://cdn.sqhk.co/fagesupuwe/ggAjcLW/60928990081.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/vunam.pdfIn PDF document text
    • http://bnl-jobs.com/8099984165dg1x0.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/je6ibPo/66078349216.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/nieiiLL/34576366476.pdfIn PDF document text
    • http://nuvifufaronez.22web.org/would_like_to_inform_you_all_that.pdfIn PDF document text
    • https://razosuxox.weebly.com/uploads/1/3/4/7/134719946/9851742.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/ghjbijz/89541018809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://babudenipovux.rf.gd/52536611015.pdfIn PDF document text
    • http://pebejokepekizuz.rf.gd/binomischen_formeln_rechner.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_off0000c491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC491 5844 bytes
SHA-256: 555beb72a97e7a7c75bf7f7e5485ab9e361a27f4c44f833dfd79678d2607c947
font_01_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 9348 bytes
SHA-256: 77ca56bbf4e9a5ce9b0ee505966bc0edd4b7d6763088c58a440f73793ad1b13e

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