Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf272f342a5be224…

MALICIOUS

PDF

105.3 KB Created: 2021-02-05 11:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 67893acbd740651a7772fa4f74fc4477 SHA-1: 731b25a38f95dd789d7de69b359320816eb84b1c SHA-256: bf272f342a5be2244432ae8579eee247705f0e8bf7c84f821e2da1b1d1e127a8
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, 'leonvi.ru', which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to contracts or legal documents, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=aqib+talib+contract+rams PDF link annotation
    • http://reduslim-ordina.site/sonny_s_bbq_tallahassee_menu_pricessoh6z.pdfIn PDF document text
    • http://perevod-card2card24.site/online_piano_with_notes_labeledzpotq.pdfIn PDF document text
    • http://badge-verification-center.com/9841033667638xhv.pdfIn PDF document text
    • http://myluckywin.site/government_procurement_policy_board_manuallvxa4.pdfIn PDF document text
    • http://weinmvc.net/mathematical_physics_by_hk_dass_and_dr_rama_vermagyf7k.pdfIn PDF document text
    • http://triple-doska1.club/henry_david_thoreau_on_civil_disobedience2x5sz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joluvolob.epizy.com/learning_english_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/alien_shooter_isometric_hack_apk.pdfIn PDF document text
    • http://mitudosukekunif.epizy.com/paneresupapasusisetugakib.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/gaxiwetedur.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/whatsapp_for_android_version_6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/67801571923.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/bixapipanuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/geradavuwowawipijixide.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/chrome_full_installer_offline.pdfIn PDF document text
    • http://tesekinapoden.epizy.com/94603429895.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/picsart_pro_mod_apk_2019_apkpure.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B3 5200 bytes
SHA-256: 6c047501576d3692adf4e5e94c87780104cc642cad917499210bae03d8bc5d20
font_01_sfnt_off00015a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4F 11888 bytes
SHA-256: 119943ca23907010952e565094df9e70f94ba94659abc463c19680cc3bc027c0
font_02_sfnt_off0001830b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1830B 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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