Malicious PDF — malware analysis report

Static analysis result for SHA-256 61857ad081263d6f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-15 01:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38a147f3a21bad3e69530449eb99d0b3 SHA-1: 7133b2dbc1b0ffa7b306fc06ec2245efc8667a86 SHA-256: 61857ad081263d6f72847cb04fadbd33ca499c76d2bd52c8184ed33966e55331
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URI 'https://soxebez.ru/wix?keyword=runecrafting+guide+osrs+theoatrix' is the primary indicator of malicious intent, likely serving as a phishing lure or a redirect to a malicious site. No scripts were extracted, but the presence of external URIs suggests an attempt to download or redirect the user to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/wix?keyword=runecrafting+guide+osrs+theoatrix
    • https://cdn.sqhk.co/xubupigegi/zfhbajj/flight_club_new_york_sneaker_store.pdf
    • http://getdouche.xyz/how_do_you_reset_the_water_filter_on_a_refrigerator7uw17.pdf
    • https://cdn.sqhk.co/mixenezir/jijinjQ/old_liverpool_football_programmes.pdf
    • http://uscovidcharts.com/sonivagads4qji.pdf
    • https://cdn.sqhk.co/xawowatu/XwhiYhb/faraway_tropic_escape_level_7_notes.pdf
    • http://stroymarketmetal.ru/xuxaxad8sf9.pdf
    • http://shmelev.pro/dazejorogovagujepixoovy1z.pdf
    • http://getchambre.xyz/how_to_correct_slew_foot1fyv2.pdf
    • http://innov-cis.net/boundary_layer_separationfld5r.pdf
    • http://copriyghtconfirmed.com/brene_brown_dare_to_lead_shame_and_empathysmadw.pdf
    • http://appletopshop.ru/proctor_silex_single_serve_coffee_maker_how_to_usebozr2.pdf
    • http://idealsit.fun/melitta_caffeo_bistro_service_manualkeffi.pdf
    • https://cdn.sqhk.co/fupipevu/aZjgghd/buffalo_bills_uniform_rumors.pdf
    • http://my-favshopc.online/rupodalowamosomazukir0a99e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_f0f887cac613410186507ab381a322de.pdf?index=true
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_da2f67daacb34dc5b90f8ef115c7e892.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bb7840ca-dfd6-41c7-b2f7-c0f72c8b29f6/how_to_connect_qcy_t1c.pdf
    • https://uploads.strikinglycdn.com/files/4929ffcb-5f4d-4539-bd42-50f074b2931b/how_to_get_3_digit_voice_response_number.pdf
    • https://uploads.strikinglycdn.com/files/631e10e2-aef5-4729-8c11-548fc85b657f/41122721997.pdf
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_243b902f60b342a4b87835c752a8a93c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/646e0bfb-2c85-4a6f-ab06-36354801c7ee/15440215131.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_e940d963590b4e82a3263cc87a37393a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0e61c3a6-1999-4a7c-9a41-85bf804e56df/vodimilixu.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_off0000f238.bin
cbd4b567159ebc75e27874073c1cf4e0df633c0dc17a43cc0769de10d4022388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 5324 bytes
font_01_sfnt_off00010461.bin
4f2efed7a912789100afdece85e7b72cee25f8d00cc95b7b56efd0259ad4c53a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 10396 bytes

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