Malicious PDF — malware analysis report

Static analysis result for SHA-256 697ffc9894095375…

MALICIOUS

PDF

62.8 KB Created: 2021-02-27 14:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 306fe3d298d9d627bb202e31fc3754d8 SHA-1: e2edd6ff1dbf46013ca8cfa7720407e047e36e19 SHA-256: 697ffc989409537587d4ce4bd68f80163a10922282ebaa7afb826f3325dfd102
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'gimoguvi.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://gimoguvi.ru/123?utm_term=user+guide+for+kindle+paperwhite PDF link annotation
    • http://ligewazojo.iblogger.org/73381457774.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/puxelemizow-gujojit-bazoxolotedep.pdfIn PDF document text
    • http://natiwuzoxosob.22web.org/64505810539.pdfIn PDF document text
    • http://kugamuwefula.iblogger.org/lalegasesidibedapewixuv.pdfIn PDF document text
    • http://hookup153.fun/candy_crush_saga_game_download_apk6zq6o.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/matogapibelifiv/example_of_business_plan_for_food.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/getazugulisokovikozokevo.pdfIn PDF document text
    • http://jenulozamaberur.epizy.com/what_does_kill_mean_in_town_names.pdfIn PDF document text
    • http://litofafowiralo.epizy.com/canada_visitor_visa_application_form_guide.pdfIn PDF document text
    • http://xekujigifur.epizy.com/28349741752.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/49708821184.pdfIn PDF document text
    • http://gifojakuwijipiv.rf.gd/new_dogman_book_dec_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fozeronimafawosegofer.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/bat_full_form_in_obg.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_off0000b9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A9 5448 bytes
SHA-256: 4b51fef7854ab2cd0537629d059d4dfc28a642d7037e9ce2a9d6ce1c15b9e25d
font_01_sfnt_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 9960 bytes
SHA-256: b29b636b662fd37b73fa081e13d3aac378b370cb972b3c1cc4a77016e542ca6f

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