Malicious PDF — malware analysis report

Static analysis result for SHA-256 373b2161106fa3dc…

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 22:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ac9aa35da50a6411dc5f9458ddfb073d SHA-1: 8d02a57fe155763cb42cb8a98ddce1af3d256bd2 SHA-256: 373b2161106fa3dc8bd3a9fa956c7cba9d37a26b1459ac79c533817c4c52f213
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=cardfight+area+secrets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5ff56d7f4cb16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_602a2447256f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fee9019e3784.pdfIn PDF document text
    • http://erse.xyz/bagrry_s_protein_muesli_nutrition_information3es0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_602c4df043b5a.pdfIn PDF document text
    • http://mists.space/nhl_playoff_pool_stats_2020xcb3x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fe67247d2f52.pdfIn PDF document text
    • https://gikuxowatevu.weebly.com/uploads/1/3/2/6/132681634/9877438.pdfIn PDF document text
    • http://qlemelest.online/srs_audio_sandbox_64_bit_crack4nab9.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/ac6afc485.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/rijaliwiguvex/mukedixemovibobesugo.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/agadbam_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/azure_cosmos_db_graph_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/swot_presentation_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/78789547362.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/75136109938.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/sheridan_sheets_online_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/certificado_medico_bolivia_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/parse_xml_java_android.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_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 5156 bytes
SHA-256: 554a68797a192c58cc0f97783876f63c974fc018d298b68eb9e3b2880598367f
font_01_sfnt_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 10788 bytes
SHA-256: 865b7025b5c54f852920b4692ac4b23183ccdf02643882735bf2de2ca4413dc5

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