Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea6933ade699281…

MALICIOUS

PDF

82.1 KB Created: 2021-03-02 11:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6168e051f3f5cf818840e264b279df63 SHA-1: a87f88c5f446d2f32505abddc3411da7c30e1f47 SHA-256: 7ea6933ade699281697333cd82dabb90c29216e80eecd7b9be5704527269d264
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=tabela+de+derivadas+fun%25C3%25A7%25C3%25B5es+trigonometricas PDF link annotation
    • https://cdn.sqhk.co/jebavimot/hcvigRI/dual_fuel_generators_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/igojggg/guided_reading_activity_answer_key_lesson_3.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/1hbjh74/class_appraisal_inc_mi.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/6N87hag/16152857115.pdfIn PDF document text
    • http://coloradocustomelectric.com/android_online_course_free_certificatebvtpq.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/natobugonunawudumaposo.pdfIn PDF document text
    • http://doweryklkq.space/missile_wars_minecraft_servero6k5x.pdfIn PDF document text
    • http://s7hmus.org/10.snf_fizik_konu_anlatm_201eo4ax.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/JhiOkhh/tagify_best_hashtags_for_instagram_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/0jdiehj/ssundee_escape_the_prison_fortnite.pdfIn PDF document text
    • http://milanomoda-italy.site/learn_quran_online_ukdrc5m.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/best_calorie_counter_app_for_homemade_food.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/22336073163.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/d8eigcH/fomupisemewebilijigiliga.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/JXINtgj/20405630335.pdfIn PDF document text
    • http://astrohelp.space/2d_game_backgroundoipk5.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
    • https://s3.amazonaws.com/luropiw/break_the_prison_hack_game.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/xavevapimar.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/17948371181.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/what_are_the_2_types_of_respiration.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 5772 bytes
SHA-256: 1cf7d58c1196c038d17b4884c622cc43e9a07051794afdb86e93ac7b955821a0
font_01_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 14028 bytes
SHA-256: 00b8a0d068cf926e35ebc35191b90a4826bf527f51bda1c60e70f1fed54fea74
font_02_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 16264 bytes
SHA-256: 7490f0512d425b7b68928d2de0767653bc465ede606eecca0ea44e7d2319ae3e
font_03_sfnt_off00012a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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