Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3854da8133d59ef…

MALICIOUS

PDF

70.4 KB Created: 2021-02-11 19:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 47c38aafd757c9c92363e5486d220561 SHA-1: ef7da2e4414717fe7e6f5b9e5dd6bc7d3293f363 SHA-256: b3854da8133d59efdbfcb6ace635f4e0e03956a8b91e0da52093d2684a741bc2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wb?keyword=camscanner%20for%20pc%20windows PDF link annotation
    • https://cdn.sqhk.co/nulegudup/YHW6vZ2/18468574654.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/pakidibegijozenosani.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/sofapetanole_zamina_mireguto.pdfIn PDF document text
    • https://ponorevex.weebly.com/uploads/1/3/1/3/131398269/jevig.pdfIn PDF document text
    • https://pusavipesuxa.weebly.com/uploads/1/3/1/4/131406286/942178d.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/egiwChf/54112043903.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/hibGyge/tenegumuraf.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/5IoFifV/tipugigovome.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/cdeb0b6c8d3.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/e2Lgeko/kifaxobavaxujawadudol.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/javhfii/stack_hit_ball_3d_online.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/d8c78a.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/hfQiOJY/head_to_head_racing_crazy_games.pdfIn PDF document text
    • https://pewatusikowago.weebly.com/uploads/1/3/2/6/132683224/zezozinap.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisunez/gcFGija/47441153989.pdfIn PDF document text
    • http://alisabor.design/2009_toyota_camry_hybrid_owners_manual7mlur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumepif.rf.gd/30611414140.pdfIn PDF document text
    • http://malenezi.epizy.com/arcgis_enterprise_10._7._1.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_off0000d42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42F 5268 bytes
SHA-256: f79d97b2968fa721160136b91f533aa7a6e8209453c234c52d2a695477d16459
font_01_sfnt_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 11440 bytes
SHA-256: aea7073b1070449ab57674ff5a34dd14cf92aec3beeec7646a668caa3aba066a

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