Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ee5cd5f4545bdd…

MALICIOUS

PDF

78.8 KB Created: 2021-04-13 09:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2450bcb37d4d18fd731249548c9c75d SHA-1: 221dff2cd409d91953a857774e13d074cdbec21a SHA-256: a6ee5cd5f4545bdd987cdd388bd1bc0f07d015b9e26d5d60f6021415595ed7cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'jumiwimov.ru' and appearing to be a lure related to 're zero light novel 14 english'. Heuristics indicate this PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm nature suggest a phishing or malware distribution attempt.

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/strik?utm_term=re+zero+light+novel+14+english PDF link annotation
    • https://cdn.sqhk.co/jarixizotib/d4pN9aO/gepixaluguzesisos.pdfIn PDF document text
    • http://wefufivubulal.medianewsonline.com/38137774524.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/sefagelevozuzebitu.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gjhycjj/launch_federal_credit_union_titusville_fl.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/36055675138.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/j93QsQN/youtube_bass_booster_firefox.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/av9cic4/93496100487.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/gc4ibdh/anime_samurai_images_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_ed2fd0135fe54f14a56bb7a2cf0a0098.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/titulos_de_credito_que_tienen_aparejada_ejecucion.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/online_banking_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84633fba-3231-43e1-bb25-72c338f770e4/95493144650.pdfIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_2c3bb57b7b3441218943a39f6866a9ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b971f0-b116-4615-a276-649765bcbb8e/swisher_44_rough_cut_mower_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/pelevobazim.pdfIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_6292c4f4abf04914b56fc596fcf07e21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dee16f-20a5-4a23-9a20-c95a89e30f5f/gekoliwarag.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_484536fcc58b4ad4a17eb603dc95b42c.pdf?index=trueIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_53b8dfbcb4614c8dac34e876e0dbbcd3.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_dc2deb602ace46f3b7c10c81820ceb8c.pdf?index=trueIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_ee6e732123b745f3b9aa7345b96ba459.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0360b711-6f67-41c6-97f8-aac26e6ae655/kenmore_glass_top_stove_not_working.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_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 4992 bytes
SHA-256: f5289d0a291e302485ffc0a1ee4b21515ff2c399d8e5b148b459a68a22830b43
font_01_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 11180 bytes
SHA-256: afcd09fdbd5916e64bf6f809edff85300e1d6b58bd87b83fbcf386567362e7ba
font_02_sfnt_off000115f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F9 16236 bytes
SHA-256: 3ef7555c23c13f454886973aa3538c77b5bc73bfa5ccd16be0ff0323980d5b81