Malicious PDF — malware analysis report

Static analysis result for SHA-256 004cdfbd7d312fa2…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 20:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d612d5d313874d760dd739c8ecc50dc9 SHA-1: daa44d7d261c51a113bb464f61d63a5d7598ae7d SHA-256: 004cdfbd7d312fa23adaa954822809bb76c11419b9d2f0f9ba79ecead7043c67
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 0.9996

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://xezojetit.ru/wix?keyword=bushnell+backtrack+manual PDF link annotation
    • http://linza.media/how_do_i_know_if_my_xbox_one_hard_drive_is_badyk8tx.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/fumixojupekakiguzezolem.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/wagoguforojumosipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_602783351f860.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/53984640512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_600271ba2fb7c.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/simple_math_worksheets_1st_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_601e714b79901.pdfIn PDF document text
    • http://alexandreablog.com/65545838526vbdzs.pdfIn PDF document text
    • http://you-bestshop.xyz/565652228843hde5.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/david_deida_dear_lover_excerpt.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/azure_data_factory_v2_documentation.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/too_lazy_or_too_lazy.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/sebax.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/water_pollution_problems_and_solutions.pdfIn PDF document text
    • http://igcopyrightforhelps.com/first_aid_text_bookjsv8q.pdfIn PDF document text
    • http://topdiscount.pro/703204849000008g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitafefisoju.atwebpages.com/molecular_electronic_structure_theory_helgaker.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/46206223819.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/write_complex_sentences_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/celestial_bodies_book_free.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/substitution_reaction_organic_chemistry.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_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 5292 bytes
SHA-256: 8e7108c53a4b905e306db012ff75b5c30de7f1c9b3a2323c9b5bd5f67bb86686
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 15404 bytes
SHA-256: 5ba14a0c87390c627463f5c373eae9376bb3d5ecc00bdf8a1b9e03c33e9b7e41

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