Malicious PDF — malware analysis report

Static analysis result for SHA-256 b720b0e09a5aa99c…

MALICIOUS

PDF

72.1 KB Created: 2021-03-28 15:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 709ed0441a33f6a682468ccf359f214a SHA-1: e87bea6bea4ef078e1892a10db18335613e4837a SHA-256: b720b0e09a5aa99c0ded5a2b69c3e40c42acfb24fbfbb140fd024347e574ed2d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that is likely malicious, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to a 'literary terms crossword puzzle answer key'. The presence of external URIs and the overall detection by multiple security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/wix?keyword=literary+terms+crossword+puzzle+answer+key+9th+grade
    • https://cdn.sqhk.co/numavagoko/ghhZlhc/football_championship_2020_results.pdf
    • http://antinomi.design/can_you_do_ninjutsu_in_real_life70soy.pdf
    • http://jobs-ingenieur.best/j_ai_envie_de_coucher_avec_mon_filsxgssv.pdf
    • https://cdn-cms.f-static.net/uploads/4425507/normal_60149f0f9ca76.pdf
    • http://nabavawuzafurur.mygamesonline.org/7600411570.pdf
    • http://form-lnstagramcopyrightservice.com/badamo08863.pdf
    • https://cdn.sqhk.co/guwewaxa/hbiiFij/duwuzituwuruwiso.pdf
    • http://beviluxenumiliv.mywebcommunity.org/91360458653.pdf
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fcaa7f4d4cf4.pdf
    • https://cdn.sqhk.co/wanevakaxuma/5gcPujb/sipipirujolivol.pdf
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fc5ad4887854.pdf
    • https://cdn.sqhk.co/jeposanop/iehhjgy/pekepalobeluni.pdf
    • https://cdn.sqhk.co/zuxedanafowa/gignhhA/fibur.pdf
    • http://wowitaly.pro/ap_human_geography_ap_test_practiceve4ta.pdf
    • http://meetsoda.club/what_size_speakers_are_in_a_jeep_wranglerh9j0k.pdf
    • https://cdn.sqhk.co/gajeneset/hP0coXd/60249828740.pdf
    • https://cdn.sqhk.co/xefijumu/eRmhaOZ/dj_player_app_for_android_free_download.pdf
    • https://cdn.sqhk.co/notokulojow/khdzjgI/black_friday_deals_on_tvs_now.pdf
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6044936f1d4e1.pdf
    • https://cdn.sqhk.co/nanijamu/e8i7ieI/badass_alter_ego_names_female.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zamemigojat/plastic_dust_sheets_asda.pdf
    • https://s3.amazonaws.com/bepukuba/vocabulary_from_classical_roots_5.pdf
    • http://xirozaza.onlinewebshop.net/91927850187.pdf
    • https://s3.amazonaws.com/wenobagupexekap/bernette_46_sewing_machine_manual.pdf
    • https://s3.amazonaws.com/nazekisigiduz/bluetooth_scanner_pc_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_off0000db60.bin
4d0e30e5a6bdbc5f6bb6a8db3765a4f2063c8ab867f05781c5bc86fe781481ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5892 bytes
font_01_sfnt_off0000ef68.bin
71eb6982866020867ad88a70675b82f739ad0889f420cacf40070c706b229ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10188 bytes

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