Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bf0a870b823ea0…

MALICIOUS

PDF

75.9 KB Created: 2021-03-06 02:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e594db8c4279bd6b83efc4c07463d146 SHA-1: e7bc0f53f162278dcbe6b775b8d7e745bd08c4a4 SHA-256: f0bf0a870b823ea0f57f681e7f721c0652a4707c461da84076b99c0b28d77749
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=safety+first+car+seat+and+stroller+reviews', which is likely the primary lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the phishing lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=safety+first+car+seat+and+stroller+reviews
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ff44b5aae2e4.pdf
    • http://lusivemewuza.22web.org/59069617768.pdf
    • https://cdn.sqhk.co/takularozo/2Eiapgd/taxumana.pdf
    • https://cdn.sqhk.co/zadoweferoxe/hiHgdOe/5683382797.pdf
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5fffa3f913588.pdf
    • http://vugadabupujexax.22web.org/steps_to_personal_revival_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zewipidurat.epizy.com/dewurugizukij.pdf
    • http://nomekerileme.epizy.com/what_is_the_definition_of_social_science_research.pdf
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_1844e74f33674ca2a538ff7caed49aa5.pdf?index=true
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_b981ace50c0845d68f99817dc0791da3.pdf?index=true
    • http://zilidezokap.epizy.com/latest_odia_bhajan_songs_free.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_72bcf3ab584943cfad60f1425fa2bedb.pdf?index=true
    • http://rovunebezub.epizy.com/canon_rebel_t6_firmware_update.pdf
    • https://uploads.strikinglycdn.com/files/bec24e3e-28b2-4935-8dda-b44b1cea9b06/is_there_a_camera_on_kindle_fire.pdf
    • http://kixasudasiwub.epizy.com/nedinowutapapof.pdf
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_24195a4f29a74e599f280f5e8a114dd5.pdf?index=true
    • http://bokakemipik.epizy.com/accountant_reporting_job_description.pdf
    • https://uploads.strikinglycdn.com/files/f6465d35-8fe1-4ee4-a190-999d3f278d5a/fijajekoxaxezomi.pdf
    • http://vamivesuger.epizy.com/69112678644.pdf
    • http://zinowor.epizy.com/jefadeji.pdf
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_a0c3899204a6437cb13f78ce8b842555.pdf?index=true
    • https://uploads.strikinglycdn.com/files/44a83a0c-9f5c-479a-861c-323d48829884/how_to_use_rdp_dive_table.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_off0000ec59.bin
18c83598b9e258c778c52d17306984f444aab6d339a760a420238338fed6eafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 5372 bytes
font_01_sfnt_off0000feca.bin
5008b6c14a61ed1ac94c8ada23be19b6df82c2427a4a8cb5cc224494c4c56682		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 10428 bytes

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