Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b59f035d7bc4e7…

MALICIOUS

PDF

69.5 KB Created: 2021-04-21 02:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 815a804781bf14154e7248536efce3ae SHA-1: c48d76b12c9b9288bde0b0371c651059b648f018 SHA-256: 15b59f035d7bc4e7059594fc95466b10c9770fffc5c3af688a2b308033aca917
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 0.9994

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://jottigo.ru/strik?utm_term=descargar+libro+edipo+rey+pdf+gratis PDF link annotation
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/093105a.pdfIn PDF document text
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/59ad82396cafc.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/saffire_pro_40_manual_espaol.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/85583804711.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/QEFgfwu/top_petroleum_engineering_colleges_in_tamilnadu.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/takebelabubolu.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/4436005.pdfIn PDF document text
    • http://dostafood.xyz/19171129300h8e2j.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/gg2iaid/4524052751.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/fiie0gj/posenipu.pdfIn PDF document text
    • http://hookup682.site/spiderman_games_pc_free_full_versionvdfk4.pdfIn PDF document text
    • http://fortuneo-enligne.com/catherine_ponderws6ol.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/envision_math_grade_5_teacher_edition.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/mitsubishi_mr_slim_inverter.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/isEighf/sling_tv_channels.pdfIn PDF document text
    • https://tazusarativiwu.weebly.com/uploads/1/3/4/5/134510609/fanulozusabanuseko.pdfIn PDF document text
    • http://trynutra.shop/228206185759gfxb.pdfIn PDF document text
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/9393308.pdfIn PDF document text
    • http://dobuwiwitevotir.sportsontheweb.net/jiraludonamowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxuluxusit.atwebpages.com/rixut.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/donitedesubogaxiloxotuva.pdfIn PDF document text
    • http://winimoviwimi.myartsonline.com/36251840069.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/56792014172.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/dream_interpretation_spiders_crawling_on_me.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/how_much_does_covid_testing_cost_at_urgent_care.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_off0000d07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07A 5564 bytes
SHA-256: 1dbf9394530a6535b30392705b677098603aa2a4da986c6f7546ca15e1cb53c9
font_01_sfnt_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 10776 bytes
SHA-256: 7e1c762e7d95734b8c5c8db8f47680e216c4e1ce9c364cb69d6ccbd9c27a5e79

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