Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1870dd8b6434fd…

MALICIOUS

PDF

75.1 KB Created: 2021-03-31 04:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ce2f76a8dc3706034645e2c6bc0c75fa SHA-1: 1ee0c47249baf634a9130350cf446873834e3196 SHA-256: 4d1870dd8b6434fd98dc2eb611091d06e8d79a15a482954f9a3e634296c81b3a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a common lure tactic.

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://ponafet.ru/wix?keyword=hardest+easy+demons+list PDF link annotation
    • http://kersita.fun/cules_son_los_sacramentos_y_su_significado90emt.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/the_monkey_king_3_hindi_download_kaise_kare.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/375144256346ezhl.pdfIn PDF document text
    • http://feriwokefawu.22web.org/stock_market_closed_today_india.pdfIn PDF document text
    • http://hookup154.online/ledikazeketidiwijigidowz1r3.pdfIn PDF document text
    • http://tehnotop.space/56486864078dq23t.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/estandares_y_expectativas_de_estudios_sociales_sexto_grado.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/mixaxed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/building_materials_list_and_price.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_e83f6e5d475f4cd9b8feda89ae1779b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ca5718-7007-4757-8db2-4904d619f93f/xbox_error_807b01f7.pdfIn PDF document text
    • http://vewawukeko.epizy.com/concepto_de_interculturalidad_segun_autores.pdfIn PDF document text
    • http://susugafof.epizy.com/11403338620.pdfIn PDF document text
    • http://zezuwolajo.rf.gd/how_to_charge_wii_remote_without_charger.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_18c10747b9794b44b6a7229ef749c211.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_17d63fcc56bf450f9d8a2a5bff79278d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/025f2bb5-3a8a-42f1-b0c6-03f8f228264d/divergent_2014_full_movie_download_480p.pdfIn PDF document text
    • http://funazowo.rf.gd/wibijapojijirowonutadonak.pdfIn PDF document text
    • http://lofapubuwuleto.epizy.com/domain_range_and_end_behavior_worksheet.pdfIn PDF document text
    • http://jolivawojo.rf.gd/bumiso.pdfIn PDF document text
    • http://turomidujamo.epizy.com/21160156673.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_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 5032 bytes
SHA-256: d3720ee9d39eda16307b4e05decdd18d32927c5813ebe1a9e89129b79c2d68bd
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 12004 bytes
SHA-256: 780c03ddc4c71ead95af9613f56ae45808a1104b3a11bb8b84a906627549f356

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