Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52cb0c53ca362f5…

MALICIOUS

PDF

87.1 KB Created: 2021-03-03 15:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8636dbda738f3312ee431a3aad35cc43 SHA-1: 42a52cef371723bd6ececd8ca3accf1bfdf79d27 SHA-256: f52cb0c53ca362f585816b154785878a074d4463db691d8accbf3174bdad5a68
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://jottigo.ru/award?keyword=how+to+pray+to+get+your+husband+back PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486363/normal_60329d10078df.pdfIn PDF document text
    • https://cdn.sqhk.co/zisenusaf/jhhaHii/14666613677.pdfIn PDF document text
    • http://slmit.space/69896239033ph1n0.pdfIn PDF document text
    • http://trikotoria.ru/lolifubigolijinuwupumlops.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/Bgjvhip/niwolux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_601d2fd62a4f3.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/ejagjdm/2469228567.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/cLjj4xW/world_conqueror_4_war_master.pdfIn PDF document text
    • https://cdn.sqhk.co/revujinarewu/UCUBhdl/expanse_season_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_603c2e75cddf0.pdfIn PDF document text
    • http://blockhcain.host/fomobujuwidawoleruirj2h.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/richard_nixon_the_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_6027f6cbc2ad4.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/wewat.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/what_is_the_poem_the_raven_all_about.pdfIn PDF document text
    • https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/74c7f1eb13.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/94282134838.pdfIn PDF document text
    • http://digitalmedialit.com/802222317670p2dn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 5664 bytes
SHA-256: a0c8bf83e13a8803f5d90d11bd13cd39f12e4595968e1abacc828450dc4e25d9
font_01_sfnt_off00012bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCE 10440 bytes
SHA-256: 4e3771c080ebfb6deb35de6779fce0d3f73bd079b49ebd1b6b522a507b6cad7a