Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8d6a9b1eeb33fc…

MALICIOUS

PDF

148.4 KB Created: 2021-03-26 08:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc08e466f9d9bb4b4fbd73f1d4f83b4 SHA-1: 2a149c56ee19e21d0dee510cf2781113957280e6 SHA-256: aa8d6a9b1eeb33fce1bb8637dbc872c131053e0430e61030d764e33b8f5c5a98
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded URL that directs users to a site disguised as a manual, likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/wix?keyword=omron+e5cn+manual
    • http://verification-help.business/90218147141kk4f4.pdf
    • https://cdn-cms.f-static.net/uploads/4478133/normal_600c029a44983.pdf
    • http://neip-forum.fun/dd_3.5_best_melee_prestige_classesb4497.pdf
    • https://cdn-cms.f-static.net/uploads/4418778/normal_6010fa29d0806.pdf
    • https://cdn-cms.f-static.net/uploads/4447647/normal_60343e885d230.pdf
    • http://55571.ru/why_is_the_red_light_flashing_on_my_freezerjcrdy.pdf
    • https://cdn-cms.f-static.net/uploads/4451929/normal_602f7a99be8d2.pdf
    • https://cdn-cms.f-static.net/uploads/4426972/normal_60414eb508c21.pdf
    • http://changely.club/auto_clicker_conquer_online_freeoj59d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_4e231f2601064fcba1035c39e4f5ccf1.pdf?index=true
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_027e1e6b42914e4f8626a48cfe57e55c.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_adb1e50250bc401f8e32e36ff4259d3f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2f88c6cd-2d03-4508-a5e6-278c0fadec7d/proyecto_caballo_de_troya_fue_real.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_c10be3e759424c179349c0aa48bd500a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0bf883fb-904f-4fb6-b929-006e6a306bdb/why_my_roku_remote_is_not_working.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_175ad1e6584545cfba1f370d063aacad.pdf?index=true
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_16501e85f40b408f98b4cf86a4c9f9f8.pdf?index=true
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_cbb77342113f4eceb85bce4f9427b69a.pdf?index=true
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_f4315ebfc2974bdc89d5057aa8de1352.pdf?index=true
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_147330cfa27448f8bc9f3fbf0712599d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1d1da3b4-92ed-41e8-9cd5-19b20010ce11/36707013720.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001efe8.bin
9d551c36f6bbf871b330b05f900f55ddb49e2a44502428a4bf055a81e36e9795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFE8 4920 bytes
font_01_sfnt_off0002008d.bin
36261eb8ec5c454f087f9d590b81adc0ad307c96fd0da3239b06dd5c650f13d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2008D 13088 bytes
font_02_sfnt_off00022d2d.bin
116e1aefc1bdc9fdbdc8bc4ca32ed8fc2a9096b6ae60b76e258fcc2d5524df3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22D2D 16112 bytes

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