Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbee41e9ce3b974…

MALICIOUS

PDF

73.4 KB Created: 2021-03-13 18:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 2b9dd356e03aef4af4821312fb27ba40 SHA-1: fd7dfeffe634a1a4564856e4555dd00712daf74c SHA-256: bcbee41e9ce3b9745f69afa5a187d08cf1325d2eac76037a8030bfd7bbee6523
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'jumiwimov.ru' which is likely the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external URIs hosted on disposable domains, suggesting a broader campaign for traffic redirection or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wb?keyword=how%20to%20draw%20stuff%20book PDF link annotation
    • http://xulazawelinuze.scienceontheweb.net/aa_12_steps_including_powerful_4th_step_worksheets.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/canon_i_sensys_mf4450_windows_10_driver.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/how_to_draw_anime_fast.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/laneruxu.pdfIn PDF document text
    • http://wepisoja.mypressonline.com/49519098632.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/convert_base64_to_image_javascript.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/Bhejcut/fruit_splash_math.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/curso_de_economia_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/dCCifhf/kanto_region_places_to_visit.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/aiaiWQm/amazing_adventure_run_3d_game_download.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/standard_of_excellence_jazz_ensemble_method_guitar.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/jujufepemizijojuroja.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/cI1xij6/51861064840.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/beats_studio_1_wired_red.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/6OjiAjj/41935283305.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/edD13cp/busej.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/1jbXI12/11474697076.pdfIn PDF document text
    • https://cdn.sqhk.co/kujufemom/Rghh7jg/zazebirateretitegulevi.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/jf7ugfD/never_gone_apk_data.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/ejcA1hi/gogumadimekegagavepomokob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxepivol.myartsonline.com/josujisojamazi.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/16733604846.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/remington_16_inch_electric_chainsaw_sprocket.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/rovalogenamowixini.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/doluxo.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 5128 bytes
SHA-256: 294c4b1442d1b78775316909d7cefa8a33ca02b266dfb4a470c97365b5c83010
font_01_sfnt_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 9868 bytes
SHA-256: 3f85bd3de7fdb3e13002c5e3b0a22382d71f150eb3f572bc13be0c18c8abf761

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