Malicious PDF — malware analysis report

Static analysis result for SHA-256 22aa05dbad4b998f…

MALICIOUS

PDF

76.2 KB Created: 2021-02-28 14:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 46c0a848be91d90afd085b52a853908c SHA-1: 499dbd8574657b45f0e570df7b2debe3a303f0fe SHA-256: 22aa05dbad4b998f7b66b42300c8d0cc66f6a44c5e038e988e5de1b09666748c
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the PDF is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=what+does+the+term+tee+off+meaning PDF link annotation
    • http://avit0.cc/air_conditioning_maintenance_checklist_formsg3m8b.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/farming_simulator_15_download_pc_windows_10.pdfIn PDF document text
    • http://sodahq.club/itil_service_improvement_plan_templatebyyly.pdfIn PDF document text
    • http://lozhobelir.space/levewadutidosanntunv.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/88732507260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fd9975c29c7b.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/how_to_set_up_focusrite_scarlett_18i8.pdfIn PDF document text
    • https://cdn.sqhk.co/finelega/QYTijhi/47229247687.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/ijDI2hc/794550730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424330/normal_5fe41616a40db.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/igCgfha/ice_cube_arcade_game.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/lagagasugipoxizajubevim.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/35460470305.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/tosugogejesukimonewogizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sevoga/path_of_exile_azurite_mine_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/75647396547.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/anglesey_coastal_path_map.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/what_is_pdp_controller.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_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 5304 bytes
SHA-256: dd4d7122b80e4662f4aa98b741edfb90cd5ad043d667c638bfec5468852146be
font_01_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 11184 bytes
SHA-256: 580c7ee26aa714a34c0eb595e6eefafc70ddabae90b5c5dcc470620a69d0b069

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