Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9e817a68004c11…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 05:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9482db34bc0d971b2116c4f245a05ea0 SHA-1: 17d2f31e3e533b033364ad56152d955b31775c75 SHA-256: ae9e817a68004c1176568517118742d0f0b58e15d23dcfea28db76a34d18ef3c
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=dell+optiplex+9020+sff+desktop+pc PDF link annotation
    • http://help-feedback-amzn3.xyz/graphing_inequalities_kuta_worksheethf7lm.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/fReWghd/bomber_friends_apk_old_version.pdfIn PDF document text
    • https://kujarubokaja.weebly.com/uploads/1/3/4/5/134590089/642021.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/cf91154a9ff0e45.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/c1fb7dbbf4206.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/zendesk_guide_searchq1k1n.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/periodontitis_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/1hh4gej/28900915556.pdfIn PDF document text
    • http://winoraama.website/how_to_install_hp_laserjet_p1102w_without_cdtgkmc.pdfIn PDF document text
    • http://dutov.org/what_is_a_house_blessing_ceremonyvjtoz.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/causes_of_internet_addiction.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/1tOheTs/visit_florida_job_cuts.pdfIn PDF document text
    • http://leoidet.xyz/mathematics_textbook_for_class_8_chapter_14_factorisationmidt5.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/giDthau/3663193487.pdfIn PDF document text
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/seratiguxanerexak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tomenederixi.epizy.com/38882713299.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_d12b5fdcc4ef46eab22fb28be94917c4.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_1e7ca4ea99ad471e9bb06e10401388e2.pdf?index=trueIn PDF document text
    • http://robexekipojop.rf.gd/bridgeton_public_schools_salary_guide_2017.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/17948170953.pdfIn PDF document text
    • http://womawujun.atwebpages.com/scientific_paper_example.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_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5404 bytes
SHA-256: 4df13c2420f9e28b1cd15174b7baa0a5c7f1461ad6a2f125d718d73a41235705
font_01_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 16344 bytes
SHA-256: ea76867a64beadbd3614cddd0792d5a70145c118e4e6c665e0ea9439e30676fa

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