Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b99ee19ed4be65…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 20:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a6e8bdfb7e3b7c19c42e3ef3dd5d61ea SHA-1: a70e468464ea8e275994cc33ab7b696f7774349a SHA-256: 09b99ee19ed4be6569ac19964df90a17fd218e2a25fef0c1432ca9f81ec94589
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and potentially malicious domains, suggesting a link farm designed to redirect users to harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly supports this, indicating a tactic to obscure the true malicious destination.

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://jumiwimov.ru/wix?keyword=milk+and+honey+online+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382418/normal_6043560f6d32b.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/80313801956.pdfIn PDF document text
    • http://denefilexepovow.iblogger.org/navien_npe-240s_installation_manual.pdfIn PDF document text
    • http://mebets.xyz/los_juegos_del_hambre_en_llamas_pelicula_completa_subtitulada_en_espaol1h9ms.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/mowabesixerokefag.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/exerccios_tabela_peridica_9o_ano.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/what_are_the_12_steps_in_overeaters_anonymousvhb2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_602d6d5a8e839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fdff4809f259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5ffc20c675265.pdfIn PDF document text
    • http://50offstore.pro/conceito_de_texto_expositivo_argumentativo4mm3h.pdfIn PDF document text
    • http://puboreru.22web.org/42796317840.pdfIn PDF document text
    • http://productwood.ru/gakezikolasui3doa.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/yaar_nuri_ztrk_hz_aie_ka_yanda_evlendi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debagejusuwaj.epizy.com/bing_wallpaper_pack.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_e9a35d98cfd143fa9a3fbe19039c0fc9.pdf?index=trueIn PDF document text
    • http://kunijudodo.rf.gd/beaconsfield_primary_school_uniform.pdfIn PDF document text
    • http://darikimobobu.epizy.com/beds_are_burning_chords.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/easy_afrikaans_stories_to_read.pdfIn PDF document text
    • http://zupifimiture.rf.gd/vosodoresozewaxarax.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0fb83103f5b040aa8f1cb8e80e35bc4b.pdf?index=trueIn PDF document text
    • http://ramuzetajomi.rf.gd/ayyappan_video_songs_masstamilan.pdfIn PDF document text
    • http://lanadofebanubod.epizy.com/73525669908.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_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 5120 bytes
SHA-256: 425832aa8c978c1774af9414308c44e91f9bd57de05c8d2926ae26b256b58d7a
font_01_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 14904 bytes
SHA-256: a96d1d2eb2a0d4720797b512b9d756baa2570d21edd821ee4ca816816bc039ca

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