Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db2dd975c2e8737…

MALICIOUS

PDF

74.7 KB Created: 2021-03-29 05:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1ff8e43062d8b7cdfcae2d53b80dd2c5 SHA-1: 16395fc92318fb420d219279dc9faec7e1eb1635 SHA-256: 2db2dd975c2e87370d98207aa47b780c60671e6b0841b80232ad0a3256a2145a
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 0.9997

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://kuzutuzo.ru/strik?utm_term=innova+3130f+firmware+update PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453888/normal_5ff831b493191.pdfIn PDF document text
    • http://servicesforsupport.com/how_to_manifest_a_financial_miraclec5b2k.pdfIn PDF document text
    • http://huseyincanx.com/how_do_you_become_tableau_certifiedzjq5c.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/73992330870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fdd78e02b6ca.pdfIn PDF document text
    • http://vilopeg.xyz/6009085357enaup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fc99ec37c68e.pdfIn PDF document text
    • http://igbusinessabouthelp.com/what_model_is_my_ezgojb8ut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6041a14a19fd3.pdfIn PDF document text
    • http://everydays.space/information_about_annular_solar_eclipseq80lv.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/zafivoludubodumuja.pdfIn PDF document text
    • http://snail-case.store/xixarezinuxobibitakepugzdsqt.pdfIn PDF document text
    • http://podarokinsta365.site/statics_and_mechanics_of_materials_chapter_3_solutionsosps8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zirutabu.myartsonline.com/detowakezowepotesir.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_9c9fe091b487442c9a7ab8c13cb081f9.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_48909cc2e9a749f98acb31bd5457a75f.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_ae477b457a45469989c049b60bf2db42.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_5871b5467e764aa1ba6c589bcc556caa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/ipega_controller_ios_13.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/cara_atlantica_online_valofe.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_48cdd87294bf46b5867a3099ee61f886.pdf?index=trueIn 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_off0000e270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 5424 bytes
SHA-256: 894eb1f5b836bb94675babe6c9dcecea24ff0e84f8f55c2a406b67f6c11b7c38
font_01_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 11892 bytes
SHA-256: f6e3a74b2cfc2c28afdb57cf1252e60a5ec01519f837089dd5ff0e062be552b6

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