Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00ec5261011a3cb…

MALICIOUS

PDF

90.8 KB Created: 2021-03-20 10:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 94cdc9e42cc424f20a3dea6996838352 SHA-1: 27b3f18c83904f999f8ca244a72c78d54de0e9dc SHA-256: b00ec5261011a3cb8c79383fba324b1dac8f371c13285e132a2305abf643461c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly supports the attack pattern of directing users to external malicious sites.

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://baarspo.ru/wix?keyword=free+rider+2+google+sites PDF link annotation
    • https://cdn.sqhk.co/kubemuzu/GahjSTH/dispute_items_on_your_credit_report.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/Nhciagi/fugoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_604cc1fba3fbf.pdfIn PDF document text
    • http://weinmvc.net/diary_of_a_wimpy_kid_book_4_read_online_free3cgq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_5fd7edff2ec86.pdfIn PDF document text
    • http://ruregere.sportsontheweb.net/kawafa.pdfIn PDF document text
    • http://katermore.ru/xelefarilal17lya.pdfIn PDF document text
    • http://invitesistem.ru/traductor_de_espaol_a_portugues_brasileo_con_audioqt9cx.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/j1Sghcr/balance_sheet_of_puma_company_2016-_17.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/jhieVii/72552950650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_602426cb0a3cd.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/anxiety_relief_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/fhfgjji/international_superstar_soccer_98_wikipedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5fdfaf573c9ab.pdfIn PDF document text
    • http://topvideo.design/five_kingdoms_sky_raiders_moviey4yxq.pdfIn PDF document text
    • http://the-english-temple.com/honda_hs928_shear_bolt_sizexg9p7.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/32_makeup_brushes_and_their_uses.pdfIn PDF document text
    • http://vkrowl.com/biblia_reina_valera_online_amen_amen6eedk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_60316d0b4bf41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropupifalapoges.atwebpages.com/94707147561.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/godas.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_off000122f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F0 4872 bytes
SHA-256: d2088369e4957cca106214cfd43088e31f43258d717c78b46af2a7577e769b95
font_01_sfnt_off00013396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13396 12896 bytes
SHA-256: d844b3ee054915913749300d0ade1ac702001527c106fdc39efecd1439fe2cb4

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