Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f90a11111d4ee5…

MALICIOUS

PDF

85.9 KB Created: 2021-04-22 03:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d211026e8404347fd595a964547e4df2 SHA-1: 99c259c3b43c63f3cb30111989691b3e3d5d1b92 SHA-256: e3f90a11111d4ee5d942dab50447ad2399ed654d0de9bf1650a48aaf9028aef2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains text related to enabling Wi-Fi on an HP printer, likely a lure to encourage interaction. An external URI, https://kuzutuzo.ru/strik?utm_term=how+do+i+enable+wifi+direct+on+my+hp+printer, was extracted, which is highly suspicious and likely leads to a malicious payload or phishing page.

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://kuzutuzo.ru/strik?utm_term=how+do+i+enable+wifi+direct+on+my+hp+printer
    • https://cdn.sqhk.co/bafuberudod/8CgiJih/2018_desk_calendar_template_free.pdf
    • http://xopuwigevifuk.iblogger.org/totorusuf.pdf
    • http://silkhfig.bid/charter_spectrum_cable_remote_codespuuql.pdf
    • https://cdn.sqhk.co/jusigexovoz/jdejbhj/78318267880.pdf
    • http://qiwi-wallet.online/algebra_1_math_workbookzh6gp.pdf
    • https://cdn.sqhk.co/xolanikipiz/hahegf1/aliexpress_tracking_number_search.pdf
    • http://ludoritepiru.22web.org/33453913993.pdf
    • http://zunanifuxomo.iblogger.org/body_parts_vocabulary_worksheet.pdf
    • https://cdn.sqhk.co/tokarikadez/jeFheje/zenonia_5_mod_apk_unlimited_zen_2019.pdf
    • http://fly-drive.online/minority_report_game_reviewrv3ta.pdf
    • https://cdn.sqhk.co/remokuvupen/cigguqc/ikea_desk_chair_cover.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a5a9f048-71c4-4295-8b81-38c58f87a08a/circuit_analysis_examples.pdf
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_c2c89394ca784052b64ac3cb75a7f3f8.pdf?index=true
    • http://pefijolal.rf.gd/al_quran_dan_terjemahan_word.pdf
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_0fce38b8619f4b5ba16dd97d10087af6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b5c05f6d-ac36-4d28-a14a-04a8babb395d/gerakanepukaf.pdf
    • https://uploads.strikinglycdn.com/files/fd542e5c-6a76-46d3-9d1a-016fc8be1dfb/plato_books_to_read.pdf
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_6079455a65004585b4f6491c1b4ed0a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a44b6a1d-7191-4cab-aa99-7bebd43cb552/what_is_wordpress_hosting.pdf
    • http://gigezevozaf.epizy.com/bcdedit_windows_xp.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_083e5a2d270249af8e2e5d07caa02e56.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a82ce59e-a87c-49d4-873b-d4ce1ed182b4/sarolaboniwini.pdf
    • http://xavemiwikujuxuk.rf.gd/36857575432.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_off00011267.bin
91c91eb75b23ed7945f466b834284c241ec0738975aa61cc2e93441e61986a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 5512 bytes
font_01_sfnt_off00012514.bin
b2ecd33141bdad750f518135f6ea7a59582ef0387dfc3e9c4bd70ffa7118e6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 10892 bytes

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