Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cddd157a64bfd91…

MALICIOUS

PDF

68.2 KB Created: 2021-03-05 08:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6492bd2c78e30a914841930492e70fb6 SHA-1: b37a4cda626a5e0df98997493a2d2f6667a2d72a SHA-256: 4cddd157a64bfd91626aa152c5e6f2685fc00f59e769970009f559359cb71c25
136 Risk Score

Malware Insights

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

The file is a PDF that contains multiple embedded URLs, one of which is associated with a known malicious domain. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/123?utm_term=historia+de+m%25C3%25A9xico+2+santillana+pdf+completo
    • https://cdn.sqhk.co/gepeduvo/OKTifjb/gibazuwiwajipejizuwejokuf.pdf
    • https://cdn.sqhk.co/sutadejuna/jhhdaZm/the_walking_dead_season_8_episode_1_trailer.pdf
    • https://cdn.sqhk.co/razulati/gLVfhh2/97830523542.pdf
    • https://cdn.sqhk.co/mujejadalale/jijdicA/lopupivelukumufuzusinem.pdf
    • https://cdn.sqhk.co/zelosoza/GagcghR/tewadenalemot.pdf
    • https://cdn.sqhk.co/mumeriretepi/tjjhaij/cute_wallpapers_aesthetic_butterfly.pdf
    • https://cdn.sqhk.co/sevalaturi/fgsGcp3/1869903405.pdf
    • http://rokuboxajiga.medianewsonline.com/35253660561.pdf
    • https://cdn.sqhk.co/kopenanum/rhel4lL/shark_night_3d_game.pdf
    • http://help-business-media.com/zetitiman3z40a.pdf
    • http://mosomupusafebin.medianewsonline.com/how_to_play_cricket_darts_video.pdf
    • https://cdn.sqhk.co/jogekiluse/oshbRxs/foto_collagen_programm_kostenlos.pdf
    • https://cdn.sqhk.co/varaxupumami/Pgigek5/71852579138.pdf
    • https://cdn.sqhk.co/nofatazor/ggGuidw/7_words_extremely_dangerous.pdf
    • http://uber-global.com/eclipse_java_swing_designerz4596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefipa/troy-bilt_mustang_50_deck_removal.pdf
    • https://s3.amazonaws.com/lolijexejomak/chief_architect_x10_full.pdf
    • https://s3.amazonaws.com/falejogajir/adventure_time_card_wars_game_apk.pdf
    • https://s3.amazonaws.com/leteraxewe/employee_attendance_sheet_format_excel_free.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_off0000cb13.bin
ab76df2f979bc2ab2c1ae9f5fe2401ca1ae68c5aa0c9441ce82a66d584978768
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 5604 bytes
font_01_sfnt_off0000ddcc.bin
c93e852e9cef34b7dedec655dfc3fccadf6e857284299940a87a76df9c55be9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 10748 bytes