Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e6cc12155f1b75…

MALICIOUS

PDF

83.9 KB Created: 2021-03-23 07:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1d81fbbf7df3092880fe51b94ea172 SHA-1: f2c04406e1cf7bd64cbd129c97d1097f789ee6fe SHA-256: 20e6cc12155f1b75167d2c6f870bbba0fb675d2741a8dcae323f5df55405cc9f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('botokaw.ru') that is likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious content, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=permutations+vs+combinations+worksheet
    • http://sodowetan.mywebcommunity.org/ditajalokizajivi.pdf
    • http://povisowalikim.scienceontheweb.net/what_is_nasdaq_dubai.pdf
    • https://cdn.sqhk.co/dubikewe/vDiaThe/25379245059.pdf
    • http://relibafogat.sportsontheweb.net/ensinando_o_mtodo_de_ovulao_billings_parte_1.pdf
    • https://cdn.sqhk.co/mamevugixej/jbHihib/descargar_base_de_datos_qvacall_2019.pdf
    • https://cdn.sqhk.co/zatugudaxaji/jdnnXr4/fajugopu.pdf
    • https://cdn.sqhk.co/gixedomawa/QgiQjcr/24450928825.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aab6beca-24d9-4b36-bd6b-0acddd101d31/food_safety_class_mn.pdf
    • https://uploads.strikinglycdn.com/files/7c6fcc0b-d1c4-4b8c-bdeb-4961e3b10e25/toyota_camry_2018_se_tire_size.pdf
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_ec5f1c3173ab46b0982bf9f10128f2b0.pdf?index=true
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_d2e567760c0e415eb255292cdfe3433c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ad755436-ee32-489e-9443-f4cb61487ffa/rinnai_code_12_problems.pdf
    • https://uploads.strikinglycdn.com/files/8935ae73-46f5-4400-b960-ace5a458765c/interior_designing_courses_in_canada.pdf
    • https://uploads.strikinglycdn.com/files/c1db60a3-ebe5-4882-802e-4cb9399b7017/40832977584.pdf
    • https://uploads.strikinglycdn.com/files/7be1c930-7d12-4d63-bd4a-37fe135e040c/what_are_the_4_main_working_relationships.pdf
    • https://uploads.strikinglycdn.com/files/2a205f48-4941-44d8-9244-7f5015d2ba10/how_to_make_creamy_cajun_butter_sauce_for_seafood.pdf
    • https://uploads.strikinglycdn.com/files/2809bf2d-8e6d-4f61-9014-f5695cf627fc/how_to_stretch_sore_neck.pdf
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_825b09e811274f96b5fa648774298828.pdf?index=true
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_c11c508f3bf54d73bd076c04cb61d713.pdf?index=true
    • https://uploads.strikinglycdn.com/files/af0ef040-74fa-4ae8-83a8-8de4aa658231/stock_market_live_ticker_download.pdf
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_df6f2c28e00541f9ada81118b998dc11.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8558b3e2-c386-4203-9522-ee894b860a21/walmart_store_100_pharmacy_phone_number.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f319.bin
6ca7d87087dc7debcb77f343a92f7173455016d8c9d25f7fc09fc2ae7a8c98cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 5364 bytes
font_01_sfnt_off0001053e.bin
aa9d8a81e15e9b00dba3242caa19c9a15fbdfc35822dfa0b72f4b8224e2590ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 11948 bytes
font_02_sfnt_off00012cdd.bin
b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDD 16060 bytes

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