Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a21d7be21ba0e6…

MALICIOUS

PDF

73.1 KB Created: 2021-02-23 17:26:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 78cf5bef5d022cc1d25d59825fd6cdb6 SHA-1: 2e9dc64487354d9e072d136eb8724729245deba2 SHA-256: c2a21d7be21ba0e6d196a2fed356864037b70f5e35945e842e33471cd80eec13
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, such as 'https://druttle.ru/wix?keyword=orokin+derelict+vault+guide', suggests the document is designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to its creation, hinting at its nature as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=orokin+derelict+vault+guide PDF link annotation
    • https://cdn.sqhk.co/foxenikap/zXidZjc/snow_racing_2019_horse_cars_snowmobile_race.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/cDPlejh/fun_games_for_kids_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_5fc9e1eb3d44b.pdfIn PDF document text
    • http://freefire-gifts.com/jobofu16p8k.pdfIn PDF document text
    • http://girlita.space/56882020889kll1b.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/ohehfgf/vehicle_gogo_working_car_railway_crossing_crossing_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/fgetjgh/98672958133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_6029e7007e811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600a9ee973c15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388842/normal_5fcc2118c1acb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafegewoweli.epizy.com/bombay_dyeing_bed_sheets_flipkart.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/73816390061.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/sezonixepur.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/63739823807.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/free_travel_agency_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/sql_server_format_phone_number_function.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/gerd_treatment_guidelines_2017.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 5080 bytes
SHA-256: a6b33c9cc6d39937345d3e596e661f9ca3b4ff522ae567f3c4e87040ed996b86
font_01_sfnt_off0000f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 10592 bytes
SHA-256: d7cd42c183336c46880c7973a48cce0cc7007ceca9a0eb082a9e13570f6fb46e

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