Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6cbb31bcb62491…

MALICIOUS

PDF

73.5 KB Created: 2021-06-08 21:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15bef6f76a70b2fee39abcf437e179f1 SHA-1: 1c27bd0819156d8f9b2aa6c6a196502be7b81d72 SHA-256: 6c6cbb31bcb624918976bf5c6885349bb6184823d40e1c6172bc5d2229c7ea5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • 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 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://medvor.ru/pbw?utm_term=free+download+harry+potter+movies+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5fe8ba5f30b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_606d4911aeb3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c59f7d-2a72-460e-9517-44c3765c2d5e/what_is_the_toughest_sql_query_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df386cf-8787-422c-b6cf-69ac1056f0c5/como_convertir_pulgadas_a_centimetros_formula.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/stumbling_upon_happiness_daniel_gilbert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e904aa-186a-45e1-9171-df15ca4056df/kalin.pdfIn PDF document text
    • http://mavawakuto.pbworks.com/w/file/fetch/144885636/watch_ready_player_one_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35da8377-ae82-4f7e-b7d5-fbf7dbf5a8ba/best_book_to_learn_financial_modeling_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95af0eb4-ec41-4120-b22c-559f983583dc/bonanuke.pdfIn PDF document text
    • http://subazim.pbworks.com/w/file/fetch/144610533/copperplate_calligraphy_guidelines.pdfIn PDF document text
    • http://zegugas.pbworks.com/w/file/fetch/144634299/xejatapokinizap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431d2fc6-b8b6-441f-a47c-ebcaba30213d/ver_la_casa_de_los_espritus_pelicula_completa_en_espaol_gratis.pdfIn PDF document text
    • http://xosezoranad.pbworks.com/w/file/fetch/144664428/gadupivabo.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144650061/18118220138.pdfIn PDF document text
    • http://tojifen.pbworks.com/f/8483438026.pdfIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144517161/commercial_bank_of_ethiopia_android_app.pdfIn PDF document text
    • http://muzurinugaw.pbworks.com/f/fufabutuzijupoga.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144411603/esquadrao_suicida_acerto_de_contas_online_dublado.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/what_does_it_mean_when_your_vehicle_says_service_stabilitrak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f22d6ab-7640-4c92-9be4-3ff12c03f499/how_to_pass_indeed_assessments.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_off0000e0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D9 5408 bytes
SHA-256: 366efc3f7d4fa2f839a6d5f4bf71d9acb6048259d039ec18900fa1dec3d83ab6
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 11188 bytes
SHA-256: 70b4fb262b5e6994cdae1f90a1e728ee850660e68cf0ecea6ce27c3c3929fe5e

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