Malicious PDF — malware analysis report

Static analysis result for SHA-256 762ad6759ad99214…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 08:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9963b05bea031acae5fad1fc82054b86 SHA-1: c06c3fe0951c95ef36854c818639855adcf3dcff SHA-256: 762ad6759ad99214e14d103557c55f23bf9507c8ceb26413fc230bc65bd8d13a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/123?utm_term=mardi+gras+mask+template+cut+out PDF link annotation
    • http://nariwunuzaw.scienceontheweb.net/64410409132.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/ftcA8ZH/text_generator_with_emojis.pdfIn PDF document text
    • http://degimogug.mypressonline.com/35526120527.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/hunter_x_core_will_not_reset.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/all_books_and_authors_2020.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/vulejis.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/dezuwapijuzena.pdfIn PDF document text
    • http://cleanup-sale.site/nebukurujofodgpl4z.pdfIn PDF document text
    • https://cdn.sqhk.co/fidegelotag/4MgeMGB/homemade_ice_cream_recipe_with_condensed_milk.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/qgg5ifD/70753913968.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/ehciTid/kezenivegope.pdfIn PDF document text
    • http://dokakepitizix.medianewsonline.com/electronic_ignition_system_download.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/fanojtjr2y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/57bbb2a4-4783-4c20-b708-ae73687013bd/wordly_wise_3000_book_11_answer_key_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2124651b-b851-4eb3-adbf-9328db39b554/lodafutuxurifapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439890fe-2e7d-47e3-bc00-93ec01e9aa81/how_to_clean_a_furnace_filter_video.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/levi_s_shoes_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/junavunuburoxeboninatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ab262f-1762-441b-842e-f06d58a2264d/kakinuloto.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/83290535859.pdfIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/mythology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/da_jesus_book_bible_app.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5240 bytes
SHA-256: 36a7fc6c88477d9e219b4f7c562dd81a0441fa0115e87e3efb6257fbea9af925
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 10048 bytes
SHA-256: 80d857619c792f36de860a2d9448b9aa67c9b2e7190b293c95e2a5d4ab96830d
font_02_sfnt_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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