Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c4c662237761c6…

MALICIOUS

PDF

82.5 KB Created: 2021-04-07 06:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e8930f6dae57df01978522ce37e033 SHA-1: 957c58f242284e575f797537d069c96b8df0ec75 SHA-256: b6c4c662237761c60f73f99d5d5c9cdff6eab0a0cc18cbb4b4cef00cfa1bc583
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into clicking a link for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=how+to+get+a+private+investigator+licence+in+ontario
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdf
    • https://cdn.sqhk.co/guzikiku/Imk4hgT/48110284301.pdf
    • http://bagesopabiwub.scienceontheweb.net/fozonogudexewobibe.pdf
    • http://fulokixowo.scienceontheweb.net/95408888995.pdf
    • http://mujoxoluvisukid.getenjoyment.net/designing_brand_identity_fifth_edition.pdf
    • http://zuvatewovu.scienceontheweb.net/jiderixamurexesuru.pdf
    • http://bazunujovi.scienceontheweb.net/rapid_clinical_pharmacology.pdf
    • http://lorewipa.scienceontheweb.net/mubowa.pdf
    • http://wulutano.mywebcommunity.org/5705696133.pdf
    • https://cdn.sqhk.co/wuwosexed/7SGHha6/the_entertainer_sheet_music_easy_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/337f5bcf-ce4e-4938-b83f-546c218c4886/93205068894.pdf
    • https://uploads.strikinglycdn.com/files/d54ac122-7761-409c-ac60-5e380fec000f/wenovanidikidorovugewov.pdf
    • https://uploads.strikinglycdn.com/files/a0f3576c-71d8-473f-8932-975931846b90/dikafimufodozuvoxusifo.pdf
    • https://uploads.strikinglycdn.com/files/7329ea0a-1120-4baa-9849-81b1f1460bfb/23099919888.pdf
    • https://uploads.strikinglycdn.com/files/fad0deaf-1577-43ef-b040-c2b75ea0a049/ni_executive_covid_19_guidelines.pdf
    • http://niwimugosaz.onlinewebshop.net/8431272443.pdf
    • https://s3.amazonaws.com/kuxuxemu/27527046452.pdf
    • http://todifisafi.atwebpages.com/up_bed_syllabus_2020.pdf
    • https://s3.amazonaws.com/voropa/kivipavamasagosuxu.pdf
    • https://uploads.strikinglycdn.com/files/8f24c5d9-7b08-423c-9153-d78b5b76cf72/is_chick_fil_a_fries_gluten_free.pdf
    • http://winimoviwimi.myartsonline.com/aspect_ratio_definition.pdf
    • https://s3.amazonaws.com/padosumifubobo/wipodipenaninusugi.pdf
    • https://uploads.strikinglycdn.com/files/7812ad76-02f7-4441-ac36-9aab73fe8802/89130878095.pdf
    • https://s3.amazonaws.com/kozibowisenatu/nulixepu.pdf
    • https://s3.amazonaws.com/xugigabitulu/logo_quiz_2_answers_level_14.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001031e.bin
8b6ac56896ae01eae8971a71c8d8ce20c883696361d8147fd366dbc8776a8e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 5212 bytes
font_01_sfnt_off00011508.bin
6a4e6ca17365e5da6c990f1d00360e80a9f3d0dc1772a20b1fbb137bb2b70b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 10836 bytes

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