Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3cd947fef37dab…

MALICIOUS

PDF

78.7 KB Created: 2021-03-13 22:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754a054bcc6bac311bed329daacc28f7 SHA-1: b5324422023a426ba6ae48abd5eda34b1f132309 SHA-256: 4b3cd947fef37dab1affc3ee024566f8ec44e0ee0781a27824d2b5fa919fe108
96 Risk Score

Malware Insights

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

The file is a PDF document that uses a lure related to "pocket bike manual pdf" to deceive the user. It contains multiple embedded URLs, one of which is associated with a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a secondary payload.

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://druttle.ru/wix?keyword=pocket+bike+manual+pdf
    • https://static.s123-cdn-static.com/uploads/4421061/normal_6001471e8bbcf.pdf
    • https://static.s123-cdn-static.com/uploads/4409616/normal_5ff4c350e00ae.pdf
    • http://naguvogegexaze.22web.org/dilibexudovabunap.pdf
    • https://cdn.sqhk.co/jututumogu/jaiaQx9/67666674880.pdf
    • http://mabixegegixalez.22web.org/69786657911.pdf
    • https://cdn.sqhk.co/mekurapiw/GBjhHr8/61136907821.pdf
    • https://cdn.sqhk.co/batovafakupo/2gis8gf/49739248532.pdf
    • https://cdn.sqhk.co/zikegasenar/jmihggw/28543461335.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_6014ebd2b8232.pdf
    • https://cdn.sqhk.co/nabowixufori/WjdTiir/20414936436.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://runesufosufej.rf.gd/crafting_guide_mod_1._12.pdf
    • https://s3.amazonaws.com/mexesazaxasa/asmaul_husna_arab_dan_latin.pdf
    • https://s3.amazonaws.com/bagokiko/virtual_tabletop_assets_dd_beyond_integration.pdf
    • http://rilobun.rf.gd/business_code_of_conduct_template_uk.pdf
    • http://labofowidora.epizy.com/nimibukati.pdf
    • https://s3.amazonaws.com/vosimalume/jewosek.pdf
    • https://s3.amazonaws.com/muvarelo/vebabided.pdf
    • http://dabemekos.epizy.com/vegetarian_keto_recipe_book.pdf
    • http://zuvujivir.rf.gd/27176602537.pdf
    • https://s3.amazonaws.com/turip/43664037907.pdf
    • http://fapizof.rf.gd/naxopetugujubezosoxiti.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_off0000f605.bin
b411578421b2a95a0678de6b1c54eaaf570569406c0b9b6bf794228981adf89e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 5232 bytes
font_01_sfnt_off000107c8.bin
5dfbd7cf66fcce44c7ab04f718009a332f65a8754e61394da77f39089600e0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 11104 bytes

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