Malicious PDF — malware analysis report

Static analysis result for SHA-256 379b4a5acafb3218…

MALICIOUS

PDF

72.6 KB Created: 2021-03-22 13:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0bc2bc15038d468c9eb55c072d79ad SHA-1: fd43e9af54086357c8ee39c97cfd9ec3abf1c733 SHA-256: 379b4a5acafb3218b97f5231bca5a8225e2bb9588ebc90e718a5d8281bbc2708
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a phishing site, disguised as lyrics for 'Tokyo ghoul unravel'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The PDF structure itself contains duplicate objects, which is a common obfuscation technique in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=tokyo+ghoul+unravel+english+version+lyrics
    • http://xulodol.mygamesonline.org/zolikugosi.pdf
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6047b374910be.pdf
    • http://baboguzaxeleju.mypressonline.com/free_homemade_bandsaw_mill_plans.pdf
    • https://static.s123-cdn-static.com/uploads/4448096/normal_5feb587d237af.pdf
    • http://sitonuba.mypressonline.com/gofuf.pdf
    • https://cdn.sqhk.co/kimejijomaki/iIPQjfZ/solitaire_games_app_store.pdf
    • http://komaxinatobofe.medianewsonline.com/zuzawadupumikojaxa.pdf
    • https://cdn.sqhk.co/xizemeginu/1W8jecP/54068186571.pdf
    • https://cdn-cms.f-static.net/uploads/4374374/normal_600fee78b5712.pdf
    • http://zokiwedilar.mypressonline.com/98170608837.pdf
    • https://static.s123-cdn-static.com/uploads/4426257/normal_5ff904f0bf989.pdf
    • https://cdn-cms.f-static.net/uploads/4366623/normal_6022e76ea2df0.pdf
    • https://cdn-cms.f-static.net/uploads/4413735/normal_6011de16e19a8.pdf
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fdf2ac0816a2.pdf
    • https://cdn.sqhk.co/fipufose/fiiggha/best_wood_cutting_board_for_raw_meat.pdf
    • https://cdn-cms.f-static.net/uploads/4470826/normal_60254198598e7.pdf
    • https://cdn-cms.f-static.net/uploads/4406229/normal_6038ef1a0e0f7.pdf
    • https://cdn.sqhk.co/zibutodepu/jWijPWp/whatsapp_free_for_nokia_xl_1030.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sitafefisoju.atwebpages.com/all_formulas_of_maths_class_10_download.pdf
    • http://juludiripo.myartsonline.com/how_to_connect_hp_m126nw_printer_to_wifi_network.pdf
    • http://siwemoxoxawevuv.atwebpages.com/81535908734.pdf
    • https://uploads.strikinglycdn.com/files/d4de5bda-7f0a-4a75-8e11-9446e706ee0f/fatapisovawa.pdf
    • https://uploads.strikinglycdn.com/files/5cc7f92d-b1f1-4542-b23f-06f67371508d/teorema_fundamental_del_calculo_integral_definida_ejercicios_resueltos.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_off0000df16.bin
af2bc42455fb33e706ffe857c422b33df1c7eb1b603a00cba9216504ecb562d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5236 bytes
font_01_sfnt_off0000f0fc.bin
132fb7db505f37a439603ff2a710afcb842332a29f9eaa1fcf8e61e0579773ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 10500 bytes

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