Malicious PDF — malware analysis report

Static analysis result for SHA-256 4baadfe22536c1d5…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 08:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: adbf653ee78006b4eb91e6058ce93032 SHA-1: fdf27792a9930a171266789ee7bc9f41acee88f7 SHA-256: 4baadfe22536c1d5befc6da15c85541f4ae77f1c0857bda9bb7d9c759ebd5b2f
74 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a heuristic firing for a 'link farm' on disposable hosting, indicating a phishing or redirection attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were directly extracted, the overall structure and URL patterns suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=probability+for+the+enthusiastic+beginner+pdf+github PDF link annotation
    • http://remastacer.com/buy_laminating_sheets_in_bulk65b05.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/can_you_use_a_ps4_controller_on_xbox_one_without_cronusmax.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/guranovilavononowe.pdfIn PDF document text
    • http://onlinetiser.website/et_spin_blade_10-_30glhyj4.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/spanish_dictionary_book_online.pdfIn PDF document text
    • http://getfreecreditreport.info/museum_of_natural_history_virtual_scavenger_huntyzkp7.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/how_to_turn_off_audio_voice_on_samsung_tv.pdfIn PDF document text
    • http://apkweb.net/ye_mosam_ki_barish_dj_songbyqoz.pdfIn PDF document text
    • http://dmdmassage.com/890505110utqho.pdfIn PDF document text
    • http://carinsusa.com/jamoladawozolyw57q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukosivujuxu.atwebpages.com/18419194024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1aa70be-0824-4302-bf25-b602341c2b15/21259483900.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_255a4fa181834af5adb3bf3211819841.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f7e000-6fa8-469b-ac04-262ece02d5d5/60237023617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b9420e-c6f7-4551-ad11-1d6f1b23ace6/6340905420.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_38308200d4f1465696162a5eb3928e0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f45998-838c-42ea-a3a4-38532dcb85d7/52167861202.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_6b15a8bc40ef4c0a8eda27f597a10770.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_8353c5fcb25445a690bf25f9b67d3bc9.pdf?index=trueIn 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_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 5660 bytes
SHA-256: 21111c18c6bf5c1b13b1b6ef587546b720b79469c1758e1cca80e0bcce1c77c5
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 11300 bytes
SHA-256: 15b23d570d49ba1a451409eb2f9100f9bddf191f25cf74d9f5fd99eb6845103e

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