Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8041b868dc77515…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 21:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 21a67fc1fbc33a3b5a2d38ad5543fe29 SHA-1: ae61f0560110b460f8a2a61c6c9a4fcc107a9103 SHA-256: c8041b868dc77515de25115b3a58f0451df591e601f8435e40fc094eb1219abb
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=men%2527s+citizen+eco+drive+perpetual+calendar+chronograph+watch+bl5400-52a PDF link annotation
    • http://bewewafip.scienceontheweb.net/copy_of_oa_grey_sheet.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/7a89d.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/Fjhgghe/russian_car_driver_zil_130.pdfIn PDF document text
    • http://housefashion.ru/xutaduloruxlsw2v.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/fgiVLl5/avatar_maker_roblox_free.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/what_is_cvo_curriculum_vitae_in_tabular_form.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/juruxamogeguwoj-fifulegosobav-xezazalelaku.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/iiyhbgi/86799504637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_601330e63b453.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/jjAzGaz/29297624713.pdfIn PDF document text
    • http://4338bacchus.com/kiruzakijo3bpy1.pdfIn PDF document text
    • http://umniashka.ru/542224141554e2pj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5ff8aebce2e8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_60035ed07f7d1.pdfIn PDF document text
    • http://tehnotop.store/berosubogaxoripigegi5d915.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/jfXzzhe/28091974679.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/harmony_of_the_gospels_lds.pdfIn PDF document text
    • http://lollipopa.online/37066063837h4jqh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_to_identify_present_past_and_future_tense.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/wuwisad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE86 6116 bytes
SHA-256: 92cac06923f9e391ef313637edd324ea5f3be3b409ea745522c841a1828bb59b
font_01_sfnt_off0000e382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 10736 bytes
SHA-256: 74a356545642ebf6a9efc7fc16b1528e27e7c447d598152dc2ad93388506fda5
font_02_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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