Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b186bdc75b7bd51…

MALICIOUS

PDF

81.5 KB Created: 2021-05-11 22:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fae1a649e5cfe5fea1012bde0bcfa30e SHA-1: dfab145089f4338b37b4875d1278333603423058 SHA-256: 6b186bdc75b7bd51d0245a7d95047c557e2f383be7413d59e9d1d1cc80dcbb51
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=how+to+replace+hose+on+bissell+little+green+proheat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469643/normal_5ff9f4c768e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fdba64b046e6.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/hdgcCl9/58858290923.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/dbx_166xl_service_manual.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/ought_to_grammar.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/how_to_use_armitage_in_kali_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/ibje8hh/26022599158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_604cc65ed41cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_6027d71f8381f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ff9004fd4f32.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/81962284775.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/britax_pioneer_car_seat_expiration.pdfIn PDF document text
    • http://xeniveperovabef.sportsontheweb.net/59712413484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_604661916d3d6.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/f3iihij/instagram_dating_groups.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/dufuserewimov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fe45e0f953b4.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/ie8ijXb/honey_lemon_bubble_tea_recipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_60418e3f60f06.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/ic9hghi/48768200579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzekusopowe.epizy.com/javusoko.pdfIn PDF document text
    • http://ravimerafewede.epizy.com/aeriforme_o_gassoso.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/preparation_of_culture_media_microbiology.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/97554343563.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/whatsapp_plus_apk_v6._80_latest_version.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_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 5388 bytes
SHA-256: e01883c0b7325766a573e9a6f1d9130a20dcb2e644d550828b7127cf6925f6f1
font_01_sfnt_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 11016 bytes
SHA-256: fa1620162d984885a9bdfd4480894b6423cb41c4fea668b6b80722ea3cc5c041

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