Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e66153c051d67e…

MALICIOUS

PDF

80.0 KB Created: 2021-05-08 03:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 82319f8610e2bc8d8a253009ef79ccd4 SHA-1: 11562af22e58357f6ebace4c13c31e461151f644 SHA-256: e7e66153c051d67e53cbe5a7bca5368599cc33077fb949f375198227b2705505
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, https://baarspo.ru/strik, is directly associated with the document's content and likely serves as a lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing sites.

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 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.
  • 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://baarspo.ru/strik?utm_term=the+gender+game+bella+forrest+movie PDF link annotation
    • https://kevefavovedejot.weebly.com/uploads/1/3/4/7/134719756/6397464.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/45939592878.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/1014aeebffc9.pdfIn PDF document text
    • https://muvepabeburok.weebly.com/uploads/1/3/1/4/131453329/livuwuzezuna_firadine_malupe_xobojoguz.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/how_do_you_write_a_tok_essay.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/xibatogunariwije.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/37557923485.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/f9b31376-88ab-46d5-a2e5-d4167914be76/surface_area_of_composite_figures_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1530c5-b653-4bbc-a735-9f4106608968/rigexame.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/polafobexizipuzomivijiv.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/jingle_bells_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/que_es_aprendizaje_basado_en_problemas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452514ee-4714-447b-99f6-a2888122d9e9/price_jhangiani__chiang._2015._research_methods_in_psychology_second_canadian_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/favawasenogod.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/super_mario_bros_2_3ds_walkthrough_world_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b024ac0-9fbb-438a-ac2b-669e20ccecc6/doxobujifojoromagujozinit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0324b9-48cd-41c4-9c39-1ac5ada43338/24196489859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7e8668-74bb-4437-b482-5587073d8944/fixejazebadiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/what_is_the_best_electric_type_pokemon_in_emerald.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/craftsman_table_saw_model_113_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/alimentacion_y_nutricion_minsa.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/jake_miller_tech_translate_in_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc606cdf-ff23-46ce-a341-b69d2dd4d044/a_litany_for_survival_poem_summary.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_off0000f92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 5468 bytes
SHA-256: 2d1ba5b0e3fe1d4c65c79a9d5d8010119de84e4a41ec7a10685f5e0f6c33e5c5
font_01_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 11424 bytes
SHA-256: c43731150eb26582204ab7b7a8cdcf20209f90124a5060fe64164e9ace3d2356