Malicious PDF — malware analysis report

Static analysis result for SHA-256 091871aa94fe9ea3…

MALICIOUS

PDF

90.2 KB Created: 2021-02-24 11:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 375b76ac42933c0b36d18c3b690ebc11 SHA-1: 7e434776b201027de87a73e51a14b999c51f5dbc SHA-256: 091871aa94fe9ea36d5fe822b7d98910a973e060a6d14ff2e026fba5e964ae61
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 appears to be a lure for downloading a game, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=pokemon+crystal+download+nds PDF link annotation
    • https://cdn.sqhk.co/wabasenenem/ghieung/commander_collection_green_pre_order_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/ihcOSig/lyft_driver_won_t_pick_me_up.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/jjJigF1/32157093299.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/iiJtig5/english_grammar_online_classes_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5fdf1c3e435eb.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/eKv1hfW/xe_vios_roller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477630/normal_5ffcf0134d982.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/ggibhaA/roku_tv_remote_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_6034ef4fb89e9.pdfIn PDF document text
    • http://xujavimok.22web.org/winegard_satellite_dish_dip_switch_settings.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://loletusu.rf.gd/devokixibos.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/86154632591.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/lavidajokozav.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/kogogujuwuxegawutanekad.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/49185266862.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/christian_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/customer_service_satisfaction_survey_report.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/possessive_pronouns_worksheet_british_council.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 4032 bytes
SHA-256: da2f2be5d9edd17cdfc0b4f948dd3bf442bd6cb2d85fbba54de746be6167ce52
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 5084 bytes
SHA-256: 633e7662d725c236f6cf1c9779790f4b0ab2f6363f074ab56afbd612bb5561bd
font_02_sfnt_off000113a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 10452 bytes
SHA-256: 702be15d6f5d45ef847e6ab7f5a30a85f8345088b18f78c3c4330522a3688f3e
font_03_sfnt_off000137ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AC 16100 bytes
SHA-256: 2f34e2a47881d07bf5e0ddcec7fa78b88f5f828504524ebfdba63e029b22e37e
font_04_sfnt_off00014c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C74 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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