Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdbc85efd89d22e…

MALICIOUS

PDF

79.9 KB Created: 2021-03-13 21:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf11b92fafb49a833249fd23087d5cb1 SHA-1: 7de23931a852fd6660ce8a87ae58c5c125593349 SHA-256: cbdbc85efd89d22e804edd0452c5f420926eacd852c658ebf9c37602b099cc02
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "Bahria town karachi balloting results pdf 2020", indicating a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/award?keyword=bahria+town+karachi+balloting+results+pdf+2020
    • http://rmk4sale.xyz/befizuh60zo.pdf
    • https://cdn-cms.f-static.net/uploads/4394072/normal_6030001a47cb7.pdf
    • https://cdn.sqhk.co/reparepoki/yggihge/html5_color_picker_onchange.pdf
    • http://avlto.best/aircraft_conformance_engineering_servicesb10dm.pdf
    • http://circleshtang.xyz/medical_dictionary_booksmry7.pdf
    • https://cdn.sqhk.co/wazafepel/b1ihw7E/83095857919.pdf
    • https://cdn.sqhk.co/palubavuz/jVhchgf/contacts_widget_android.pdf
    • https://cdn.sqhk.co/rirexiwudag/06tijja/bottle_flip_3d_online.pdf
    • https://cdn-cms.f-static.net/uploads/4444644/normal_600e8a12ab782.pdf
    • https://cdn.sqhk.co/fakozunada/ihujjmF/37555728512.pdf
    • http://kirademom.22web.org/short_summary_of_castle_of_otranto.pdf
    • https://cdn.sqhk.co/wuwosexed/a2hhgg9/perfect_slices_mod_apk_ios.pdf
    • https://cdn.sqhk.co/dalubevemex/Yjhrdhc/wood_wallpaper_hd_free.pdf
    • https://cdn.sqhk.co/rakapuvad/lYMaSHa/android_studio_emulator_black_screen_windows_10.pdf
    • https://cdn.sqhk.co/takodabu/gejgjcE/download_game_superstar_band_manager_mod_apk.pdf
    • https://cdn.sqhk.co/jakufomego/KvN1Nja/vocopro_dsp_karaoke_mixer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ff81e4b8-5928-47f8-a0b1-cd7b60206a8d/miritusuroxefejide.pdf
    • https://uploads.strikinglycdn.com/files/016386e1-cb9d-46ed-9926-aa57f62bbc31/xfinity_x1_rf_remote_setup_onn.pdf
    • https://uploads.strikinglycdn.com/files/cff0de89-6ca1-4562-a660-a53e349a051c/xagapojusiga.pdf
    • http://tasodeporojunez.epizy.com/vefugimivobilefesovozilu.pdf
    • https://uploads.strikinglycdn.com/files/b2ab5541-4218-436d-8126-38388e260caa/have_returned_or_had_returned.pdf
    • https://uploads.strikinglycdn.com/files/9c7fdbfa-a4b1-4a4c-b3c2-e198e064140f/dr_jekyll_and_mr_hyde_duality_quotes_chapter_1.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_off0000e883.bin
cfafcbbc792ece6d6d7b00145d207fe53b2855ab129ee400ab61acc478b36cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5920 bytes
font_01_sfnt_off0000fcb0.bin
0377dfab385c55cd016e301666020e5f8faa67951f1129b910b3484cedea30fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 10756 bytes
font_02_sfnt_off00012198.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12198 4324 bytes

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