Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bf82a2eb015adf…

MALICIOUS

PDF

83.8 KB Created: 2021-03-18 05:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9bc73f5a8eecf7e92ff7af5efec6bbdd SHA-1: 9aec76858b23f4e33b83e5ff578ac927d0c5c63c SHA-256: e1bf82a2eb015adf803ad91d42269644ea94bd05a5bccd38db4d5e766d4ec5f5
156 Risk Score

Malware Insights

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

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=bex+bissell+manual+carpet+cleaner PDF link annotation
    • http://rusherx.studio/xexuzur3e8ks.pdfIn PDF document text
    • http://musc-media.xyz/anatomy_and_physiology_coloring_workbook_chapter_5_the_skeletal_system_answer_key20ixv.pdfIn PDF document text
    • https://pajolabu.weebly.com/uploads/1/3/4/4/134482361/4899778.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/ib_november_2018_exam_schedule.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/e8c9b.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/1716488.pdfIn PDF document text
    • http://genoray.pro/benekisarodukosisutomate8j9b2.pdfIn PDF document text
    • http://maska-respirator.shop/retail_marketing_file0j2bg.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/are_troy_bilt_riding_mowers_any_good.pdfIn PDF document text
    • https://bujipivew.weebly.com/uploads/1/3/4/1/134131373/pevegabopemom-wibuw-jutozunol.pdfIn PDF document text
    • http://newsportstechnology.ru/how_do_you_know_if_a_guy_is_genuinely_interestedphahh.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/whirlpool_cabrio_clicks_but_wont_start.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/englander_pellet_stove_manual_55-shp10.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/ziregekubusavokesov.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/wixatax/fadigidesuwisikag.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/44101459417.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/android_auto_bmw_serie_1_f20.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/zarasegagutawif.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/christmas_carols_youtube_playlist.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/cuneiforme_significado_resumen.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 5336 bytes
SHA-256: d2416f4d4626066464724aa8ff1ab49cccd759cd4d03c0c13798063ae84a5c63
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 11052 bytes
SHA-256: 7607bce5911eba45bacb4c600c9f6319366445870d202d9585828928fa969e43

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