Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10b37fce4246a7e…

MALICIOUS

PDF

79.9 KB Created: 2021-04-12 15:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8489b166698dacbb4e40f2b41786ccbe SHA-1: 7cec2120a26f195d7e5147221b0540d2204301e7 SHA-256: a10b37fce4246a7e5ee518525cfbd7eae8e8a34593311b730caf51eb3ec8dc3d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, suggests a lure related to the meaning of a number, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+does+the+number+332+mean
    • https://static.s123-cdn-static.com/uploads/4421040/normal_5fe03ecb3db72.pdf
    • https://cdn.sqhk.co/bitomasijelo/jgii7zB/rgb_color_match_runner.pdf
    • https://cdn.sqhk.co/moxufupog/bgfWhdY/92019749450.pdf
    • https://cdn.sqhk.co/zibavuna/jehj3zz/92914185664.pdf
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fec7d37d7a68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vidadaviwal/tivupijowisu.pdf
    • https://s3.amazonaws.com/sugosubexez/ms_project_management_software_free_download_2010_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/2032c328-258a-4d2d-a5a0-628c1fac19e9/jomiw.pdf
    • https://uploads.strikinglycdn.com/files/3070fda9-0c8d-4233-83e8-53e4748a1384/how_to_fix_panasonic_microwave_door_switch.pdf
    • https://uploads.strikinglycdn.com/files/5667e3a9-7803-4a0c-b47d-82b07bb153ce/xutafuwanutolidukomir.pdf
    • https://uploads.strikinglycdn.com/files/d016d820-cdb1-4963-8ffe-540f3922d5f1/73836312646.pdf
    • https://s3.amazonaws.com/jidosatikim/33437943605.pdf
    • https://s3.amazonaws.com/megodipewukitoj/vejuzalewon.pdf
    • https://uploads.strikinglycdn.com/files/42b885b5-f9d6-4458-95ba-bdf2367e6ed4/animal_farm_chapter_1_significant_quotes.pdf
    • https://uploads.strikinglycdn.com/files/cdda3617-2f7b-4945-9e01-949ad62ba332/zolikemabuzirilepikusetu.pdf
    • https://uploads.strikinglycdn.com/files/a0083219-da7e-41da-b526-443d1879965b/penozupogujemep.pdf
    • https://uploads.strikinglycdn.com/files/ae6abf42-8147-43f1-9b34-2aef1ab301e1/simmons_oneview_ufc.pdf
    • https://uploads.strikinglycdn.com/files/1b609dc2-129c-4648-88fa-3bebe43f02d2/93486470365.pdf
    • https://uploads.strikinglycdn.com/files/8963855a-9bdf-4c89-9b3c-71fd3255aca6/rubimi.pdf
    • https://uploads.strikinglycdn.com/files/f99da58c-a6e2-49b0-a241-4efca50504a7/flight_simulator_2020_xbox_controller_settings.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_off0000f559.bin
9d72417c9ec667f7557319751a86912eeea3fecac76821a9834d417c2e2e5afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 5480 bytes
font_01_sfnt_off000107d9.bin
1681a3345b40cebc0e68d9d64ea453fc1ebd19303993ab3e308ce01d5e6eab60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 12032 bytes

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