Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9eeff54bce3e66…

MALICIOUS

PDF

90.1 KB Created: 2021-03-13 17:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dacf159673b9e78a6c724a8b491ed65f SHA-1: 2bd51e01c9c272e88419756e53b894cb68fd484e SHA-256: da9eeff54bce3e66f40adbc8797e9008c72ce854118010faab28542ebd35210a
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user interaction via a malicious link.

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://kuzutuzo.ru/strik?utm_term=what+is+standard+operating+procedure+document
    • http://rofuxipof.mywebcommunity.org/variations_on_the_carnival_of_venice_trombone.pdf
    • http://nejurizedutopi.iblogger.org/logo_animation_after_effects_template_free.pdf
    • http://pozuliruz.iblogger.org/surezuruzalinilisuwi.pdf
    • http://donutota.iblogger.org/zixokikarunamutewes.pdf
    • http://faviwogewe.iblogger.org/fipiwupuvuja.pdf
    • http://kebotup.66ghz.com/48020788851.pdf
    • https://cdn.sqhk.co/bupedamarib/j8ZYVig/72758356416.pdf
    • https://cdn.sqhk.co/wikikifigas/OT0haie/drumstick_ice_cream_cone_tips.pdf
    • http://lodixewovufosa.iblogger.org/kapikisupubiretuwirururo.pdf
    • https://cdn.sqhk.co/sevafeluba/frC7ibC/mejaletovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://napawurimilutil.rf.gd/reducing_and_non_reducing_sugar.pdf
    • http://fawituwiluke.epizy.com/travel_expenses_template_excel.pdf
    • http://buzabokinoka.epizy.com/bonfiglioli_worm_reduction_gearbox_catalogue.pdf
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_f5ba18d14e0940379ff12b2281f3ad00.pdf?index=true
    • http://sifebitufol.onlinewebshop.net/periodic_table_coloring_worksheet.pdf
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_f646e9bdc68c4259b1e3e1454fa3c9ae.pdf?index=true
    • http://nupudanotagudot.rf.gd/how_to_share_someone_page_on_fb.pdf
    • http://fowidosufos.epizy.com/fojipupededep.pdf
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_e1d291236d254854b1cd63d49d44495b.pdf?index=true
    • http://ninalosuza.rf.gd/49457507068.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_off0001240b.bin
2d22b2d97644527686779840c9f2f2b02d8c1d79007ec3116a118c6250dc5d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1240B 5468 bytes
font_01_sfnt_off00013687.bin
1642f45a05662105676cd386af74cafd6d63476aff3fbba9b281f117c45be43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13687 10784 bytes

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