Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a40819c2ade865…

MALICIOUS

PDF

75.4 KB Created: 2021-03-19 09:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b6feee7eaea973f6ff256223aae2bf SHA-1: 75a84a06a678108360b3e9dba62c56cab3a59e5f SHA-256: d8a40819c2ade8651cc2b9d7928fa84dde912b86f0e69b60792601b64a7ed109
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of external URIs suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=internal+audit+case+study+questions+and+answers+pdf
    • http://sevezor.scienceontheweb.net/32267449509.pdf
    • https://tovukofovimo.weebly.com/uploads/1/3/4/4/134485408/pagixu-dezagewapavazan.pdf
    • http://ligugiban.scienceontheweb.net/pasukunanuzofadanonanuz.pdf
    • https://cdn.sqhk.co/kakapoxavu/iji5jgh/92740222763.pdf
    • http://gufurebu.medianewsonline.com/building_drawing_software_for_mac.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/6094896.pdf
    • http://mibilivo.scienceontheweb.net/87957490279.pdf
    • http://lezigovedavide.getenjoyment.net/bureau_of_civil_aviation_security.pdf
    • http://xokebidukefu.getenjoyment.net/crediblemeds_qtc.pdf
    • http://juzufezike.mygamesonline.org/8537134811.pdf
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/zovadivifafovatan.pdf
    • https://cdn.sqhk.co/giwitosak/RhcR2jf/cognos_report_studio_slicer_prompt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jidagafinuxesu/romerifunubobibejejogav.pdf
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_4cfd016f72254d7faab7d3c0dd29d4d6.pdf?index=true
    • http://wulibazosuxib.onlinewebshop.net/9472546307.pdf
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_e7f37409e0414b17825d9264cc461003.pdf?index=true
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_87b26a96b8de46449a0a6bcb2a275ec7.pdf?index=true
    • https://s3.amazonaws.com/vikukinumet/apex_code_tutorial.pdf
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_a4b48af18b8f43e09a409f6c55e94fc9.pdf?index=true
    • https://s3.amazonaws.com/gudukupir/powerpoint_concentration_game_template.pdf
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_d0c0709a7aad48bd94ca24cf358fb0bb.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e732.bin
76d5b56586dae306779431284de6025b871a795eb710941cdc4b00c46a206854		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 5404 bytes
font_01_sfnt_off0000f9b9.bin
500b658b93a75a97ca2085b90103480753761e19890b48dc89a5e7b5819e7c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 11348 bytes

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