Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17697d3c26a5d1c…

MALICIOUS

PDF

73.1 KB Created: 2021-04-01 08:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e255eebad0a09e43d82306cad9b38b SHA-1: 2bcb308ac97ff08bbc82f86f14a207bc5ff51181 SHA-256: c17697d3c26a5d1c73ab6e338c2ea47141238c327bf31d3c20e179c30720aa3c
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://seumenha.ru/strik?utm_term=food+web+practice+worksheet+answer+key, suggests a phishing or credential harvesting attempt disguised as a 'food web practice worksheet answer key'. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely intended to redirect the user to a malicious site for further exploitation.

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://seumenha.ru/strik?utm_term=food+web+practice+worksheet+answer+key
    • http://xuziduliwilu.iblogger.org/daxapag.pdf
    • http://zanovekolasin.mywebcommunity.org/dujuso.pdf
    • http://jepewadagamer.scienceontheweb.net/oreck_xl_canister_vacuum_cleaner.pdf
    • http://rolapisi.scienceontheweb.net/55569896681.pdf
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5ff7913ab0e75.pdf
    • http://ruxiroxawem.22web.org/bissell_proheat_2x_cleanshot_instructions.pdf
    • https://static.s123-cdn-static.com/uploads/4380223/normal_600006c2d5453.pdf
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd3a44982e32.pdf
    • http://tolebexeju.22web.org/pdf_file_reader_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jerofob.epizy.com/89115378033.pdf
    • https://uploads.strikinglycdn.com/files/a02127b1-a8af-4538-9ea0-4e53cda80ddc/11329812919.pdf
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_e2daa6c51f60447ba8543b2d6b419de8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4c7873fa-beff-44f4-9c75-23ddc4b5d429/how_to_crack_illustrator_cs6_amtlib_dll.pdf
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_e74abef8f38748bcb581e2c8b6911502.pdf?index=true
    • http://sinipuxi.epizy.com/makeup_artist_kit_checklist.pdf
    • http://lobexejabavusut.epizy.com/brush_pen_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/115d106c-4246-4972-8fe5-113137891f24/kugusolesovusulegapuz.pdf
    • http://kenozajawatulaw.rf.gd/giwegumelosefe.pdf
    • http://xebinuv.rf.gd/dmv_permit_test_florida_answers.pdf
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_5330d5c06ab64a83a41b21644a74d211.pdf?index=true
    • 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_off0000df27.bin
11a07ce1305482f1003765f968a653c68c5dc01f51f758332d03115112c5c1b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 5480 bytes
font_01_sfnt_off0000f1d9.bin
851dd759548ecc6fce1850291d27b5b2393a7aed88ebb21bfd331f9888fb403a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10956 bytes

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