Malicious PDF — malware analysis report

Static analysis result for SHA-256 1561fab1122b2054…

MALICIOUS

PDF

73.1 KB Created: 2021-03-24 23:38:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 755a4fbe1b3cf797aaaa2e4c753137a5 SHA-1: 43f9aa5274e0c84d143b196feaf7085f4f15b3ce SHA-256: 1561fab1122b2054eba1064b7c989301c55ee2ef57a0266c75e6c0640c93687b
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'tenmarks games link', suggesting a lure related to gaming or online content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=tenmarks+games+link
    • http://dokojekiferej.mygamesonline.org/felexesidamubewo.pdf
    • http://gazozasi.scienceontheweb.net/basic_management_accounting_concepts.pdf
    • http://famozosivupiwij.sportsontheweb.net/cuisinart_14_cup_food_processor_black_friday_deals.pdf
    • http://myyshooop224.site/the_drowned_and_the_saved_downloadndf9p.pdf
    • http://kyukty68.xyz/38406712632ayt87.pdf
    • http://1xbet-registr.site/84836065306mftcu.pdf
    • http://card2card.live/jokagavevamabydqwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajixe/56240427084.pdf
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_ff7daeeaf01245fd920f0c8cad36fcfb.pdf?index=true
    • http://dapekafuxururo.myartsonline.com/clases_sociales_del_modo_de_produccion_comunista.pdf
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_84a6024fb2c74fcfb64869be3e708033.pdf?index=true
    • https://s3.amazonaws.com/tokatefozude/cheapest_business_analytics_masters_in_usa.pdf
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_0766d01775ff49638a9e90f273d3b09e.pdf?index=true
    • https://s3.amazonaws.com/remufuzu/transformao_isobrica_isotermica.pdf
    • http://wulibazosuxib.onlinewebshop.net/weight_training_routine_for_beginners_at_home.pdf
    • https://s3.amazonaws.com/senodiw/bimat.pdf
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_fc615a8f977147a8b3baa175be37ad72.pdf?index=true
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_654c48e674ae461f8d60f44b24bc20ad.pdf?index=true
    • http://mawidinivetobi.myartsonline.com/nisadosanibomomilub.pdf
    • http://pawepeg.atwebpages.com/how_to_use_humidifier_on_furnace.pdf
    • https://s3.amazonaws.com/dotivaf/new_slide_template_powerpoint.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ed.bin
e1fad774d058e0df990bee3d0e11fe9990ba41d517cae67d613e3449dd529590		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4ED 3368 bytes
font_01_sfnt_off0000e0fc.bin
eba3c6579577312ce4ee2e2bdab05214d32943340075296b443eb14bc2b1f733		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 5016 bytes
font_02_sfnt_off0000f1f1.bin
aa28104cec848d759927edb24d3156c917d90ae156ed0e41914412e05be1d88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 11260 bytes

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