Malicious PDF — malware analysis report

Static analysis result for SHA-256 efca1eb733aec828…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 04:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3e113082fdd37d7a6599925038f10fa SHA-1: d7f4ca61939289caf0d8118cb803d4705e7dd669 SHA-256: efca1eb733aec8280ecebe42d5f5d9fc0518067e1d6317562564230b2a1c79b0
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is flagged as malicious and leads to a domain associated with game-related keywords. ClamAV detection and ML classification strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site for phishing or malware distribution.

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://vilenefex.ru/wix?keyword=unblocked+apple+shooter+games
    • http://yandex-dostav.ru/9654778455964ucg.pdf
    • https://cdn.sqhk.co/jokalirubore/dlUSYEr/battles_of_world_war_2_quizlet.pdf
    • http://olymptrade.buzz/how_to_open_a_brinks_lock_boxtxws8.pdf
    • https://cdn.sqhk.co/juvowisire/fGyvYew/hide_and_seek_letra_kodaline.pdf
    • https://cdn.sqhk.co/wolebiduju/eghVhaR/word_cookies_cheat_apple_6.pdf
    • http://leyloften.online/bimanual_synkinesis_meaningdvuj6.pdf
    • http://fitokaps.xyz/843584025268tgdg.pdf
    • http://islandlandscapesbb.com/940141733409lttv.pdf
    • http://tuimag.ru/53596560866ogfa7.pdf
    • https://cdn.sqhk.co/nilesatu/gcOvsgg/best_pc_games_to_play_with_controller_2020.pdf
    • http://hugertely.xyz/how_to_reset_password_on_adt_alarm_systemblnlf.pdf
    • http://eslife.pro/gopironexumuziponevilemiipa3.pdf
    • https://cdn.sqhk.co/gogojelawov/cgidhjg/guwemufuwigavofoniwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jazofi/gevifegiko.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/company_reference_letter_template_word.pdf
    • https://s3.amazonaws.com/vikukinumet/best_space_sim_games_android.pdf
    • https://s3.amazonaws.com/kozibowisenatu/torch_lake_michigan_fishing_guides.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_off0000f679.bin
4fa09348808a2b0192b12ea0193f4082bc78d5ab1f953c090ca1782f13463686		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 5684 bytes
font_01_sfnt_off0001099b.bin
0d047f34b8b39a145d4e6f3d2327b1598ed055845dc6864e9cf74e49b951424a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 10676 bytes

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