Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d7038c0f2365dc…

MALICIOUS

PDF

99.1 KB Created: 2021-02-26 17:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e00ee94dca2f4feccd880ddbca62fe84 SHA-1: d6f4f64439a0b5961a3cec91bb6329ef7c2d0caf SHA-256: b8d7038c0f2365dc1207e58736469277bd07dd2d4a67223720f1f25a01227a0f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'functional programming tutorial javascript' and the authoring application, suggesting a lure to a malicious URL for potential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=functional+programming+tutorial+javascript PDF link annotation
    • http://jedilinosur.mywebcommunity.org/teledyne_laars_series_1_pool_heater_manual.pdfIn PDF document text
    • http://carbackseat.site/how_to_charge_rohs_smart_braceleteb8xp.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/19983814081.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/how_do_you_provide_safety_in_the_workplace_response_brainly.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/5865523659.pdfIn PDF document text
    • http://nout-prodat.site/how_many_oz_in_dunkin_donuts_coffeeu2ur0.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/warhammer_40k_dark_heresy_core_rulebook3a8z4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/tricep_kickbacks_proper_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/formal_definition_of_antipathy.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/arduino_programs_francais.pdfIn PDF document text
    • http://rozizibuno.epizy.com/toxic_britney_spears_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/pisodivusurudof.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/gewapapategiguv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13136 5344 bytes
SHA-256: ec0eec0a15a2a037e4f603e51b304ac39a76002c5068ec68175ad6a57685437a
font_01_sfnt_off00014361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14361 11188 bytes
SHA-256: 012e938530f932752e8c93eda52771c203476b78b81c600109ceb65e49cac320
font_02_sfnt_off000169f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F2 16152 bytes
SHA-256: 9dd161ad083bde31f1785977080a21cd00ffd1d65af7312c0685ba069ea0c2ef

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