Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c520759cc09e313…

MALICIOUS

PDF

71.5 KB Created: 2021-02-11 14:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 06838d5a708c5ba3eebd174ae907e17b SHA-1: b3e9d94d3e13ecd2e0d35f0b06842f37c33ec5fb SHA-256: 4c520759cc09e313b26fe6f0267fa1a43ccb56e73930e266802cc9490361add4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=saint+peter+school+jefferson+city+missouri PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff80abcb59ae.pdfIn PDF document text
    • http://strita.space/windows_7_bluetooth_app_free0g3kb.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/6mcjijj/2020_nfl_football_schedule_week_1.pdfIn PDF document text
    • http://kushtanash.ru/61674397122707su.pdfIn PDF document text
    • http://verifedform.com/833616783423ixgo.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/6ba8381cb81b0f3.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/jNPhCic/wefafekixukozanilamuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/iyghOhj/jimaxanive.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/DigKxha/top_space_arcade_games.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/zijesu.pdfIn PDF document text
    • https://luvokivimowef.weebly.com/uploads/1/3/1/6/131607407/6974094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fca49356a1cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fdf5b0758511.pdfIn PDF document text
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/gemawonofi.pdfIn PDF document text
    • http://pmaider.com/190099791910xow5.pdfIn PDF document text
    • https://wavimukuwu.weebly.com/uploads/1/3/0/8/130874629/a6857ad8c.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/rapab.pdfIn PDF document text
    • https://duniterete.weebly.com/uploads/1/3/4/6/134690204/sudufepanumu.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/wenobagupexekap/zigusebigitulujibinej.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/hernias_inguinales_pediatria.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_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 5536 bytes
SHA-256: 8cfdcd0c6b275d171d17995281c9137b4b32424b733663b29bd2c02bc5f1a3b3
font_01_sfnt_off0000ec78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC78 10472 bytes
SHA-256: 9792574d622c752636ce36c1331b9b258e84fa2a28fef88ae50a1a65424631cc

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