Malicious PDF — malware analysis report

Static analysis result for SHA-256 3625c69d51fc229c…

MALICIOUS

PDF

145.0 KB Created: 2021-05-06 22:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e960bbd7985a652fa7db1f5716e3ea23 SHA-1: 559a4aab9da3881795067195ab625a26008b3e09 SHA-256: 3625c69d51fc229c26d3b93ee66c77e276ea7abd9c99fda009e97eb0672b8369
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 0.9992

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://soxebez.ru/strik?utm_term=la+biblia+en+espa%25C3%25B1ol PDF link annotation
    • https://latelolinowom.weebly.com/uploads/1/3/5/3/135333312/lewizokeliti.pdfIn PDF document text
    • https://cdn.sqhk.co/ribuwikoli/icBARjc/cross_platform_games_android_iphone.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/rpp_dan_silabus_biologi_sma_kelas_x_kurikulum_2020.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/reazioni_alogenuri_alchilici.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_5fd10dc181585.pdfIn PDF document text
    • http://rujitexoxobag.mypressonline.com/single_phase_ac_voltage_regulator.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/diagnostico_cancer_de_prostata.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/sequence_and_series_grade_12.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/jfTjb5u/best_rock_songs_of_late_90s_early_2000s.pdfIn PDF document text
    • https://suzexumereda.weebly.com/uploads/1/3/6/0/136051641/lujafa.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/2uQcjji/61367848122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379837/normal_5fde518146a35.pdfIn PDF document text
    • https://vijuvunido.weebly.com/uploads/1/3/0/7/130740607/rokifumetu.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/benefits_of_reading_fiction.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/lKigNjC/2266818649.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/bigop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_6028e76b843a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_6032f24949674.pdfIn PDF document text
    • https://bufivenejolerad.weebly.com/uploads/1/3/4/7/134709937/3953426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_ca1f3daa9a0346de848694af0a1567a0.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_e560457c25d140b1b870ad1aa30638ba.pdf?index=trueIn PDF document text
    • http://jowosos.myartsonline.com/antecedentes_historicos_de_la_tabla_periodica.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_off0001fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBB4 5012 bytes
SHA-256: e1412060c2398534dcb94dda47fa839ffc77ebad8130e7fd156f547185731e35
font_01_sfnt_off00020c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C8C 12676 bytes
SHA-256: 7ebdbe8e31e0b890ba627b752a1bf7ce4bfefb5673eea2ef6b6bf3c232f33076

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