Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c05de420e9fd972…

MALICIOUS

PDF

75.1 KB Created: 2021-03-10 11:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: fddc411e74690eeb2572d56873233cd4 SHA-1: 5b496f550bfb2529fa62872a4ae60f10c4e43a1b SHA-256: 7c05de420e9fd972e10d74bec2b3f0162433435a9a138189c21e3da2d92b3340
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, and the presence of multiple unknown URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=sap+bpc+420+pdf PDF link annotation
    • http://ig-objectionform.com/35945855437okd19.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/igc8hbv/hocus_pocus_dani_now.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/13397963316.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/gHUyhjy/megobiwudexanilemixisop.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/8chaIk3/21943902111.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/how_to_fix_an_ice_maker_on_a_whirlpool_refrigerator.pdfIn PDF document text
    • http://meinekarten.best/alien_shooter_conscription_full_version_free7xmyq.pdfIn PDF document text
    • http://norasidifonilov.22web.org/xezimelilonab.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/1045588041.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/capacity_management_definition.pdfIn PDF document text
    • http://ericksandoval.com/pitamoniv9lk2r.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/what_is_a_dream-vision_poem.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/enhanced_batch_file_programming.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/di0vQd9/54612977778.pdfIn PDF document text
    • http://mestikon.online/secret_life_of_bees_book_character_analysisjoi9r.pdfIn PDF document text
    • http://nikaold.site/full_schedule_of_vivo_ipl_2020i78s0.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/18173084418.pdfIn PDF document text
    • http://dimivetow.iblogger.org/zefufi.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/rilamobekevoj.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/corporate_finance_formula_cheat_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozawexopad.epizy.com/singer_simple_3223g_diki_makinas.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_345907e3fdaf44549829cb1d9c2d99ee.pdf?index=trueIn PDF document text
    • http://borebatibi.rf.gd/how_to_calculate_a_reading_running_record.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_8f62606e75b64341808dbffad7e846ff.pdf?index=trueIn PDF document text
    • http://buzanuziti.myartsonline.com/ratepowog.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5448 bytes
SHA-256: a89b6a9a79ebf7c35315be22bafd19b54ba9b6eb0cc9d41986c02a2c5ffb9624
font_01_sfnt_off0000fac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 10732 bytes
SHA-256: 9eb21a8f307ac1891168343c7d52530b6f21ada96bc2720fc4670d017402ed85

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