Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9cd65f2fc51513d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-02 20:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4beeaa2e22ab397bedc4e93ba8d57c8c SHA-1: 1ac50837d3d2558ebc045c9107342185386d5bb5 SHA-256: d9cd65f2fc51513d1a889583f67fbf554d3a77502734c36788e639cecd60c98e
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://ponafet.ru/wix?keyword=csulb+summer+2020+tuition PDF link annotation
    • https://cdn.sqhk.co/momujolo/hiHhggf/draw_me_as_an_anime_character.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/cjiggUv/ducks_vs_beavers_women_s_basketball_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/iagcWgK/94420373422.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/mesiwogonegol.pdfIn PDF document text
    • http://1green.space/1417841578222h31.pdfIn PDF document text
    • http://cabinetshub.xyz/comic_book_template_powerpoint31n7g.pdfIn PDF document text
    • http://bestsaleshopin.xyz/whitechapel_documents_of_contemporary_artog6do.pdfIn PDF document text
    • http://zasasibibo.iblogger.org/jexuj.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/4hagigh/igo_navigation_software_download_for_car_sd_card.pdfIn PDF document text
    • http://pressit.fun/cara_membuat_google_form_untuk_ulanganikl09.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/4ighiMi/74814222645.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ugdBjhb/soviramela.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ibqWhiQ/kabijuni.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/senodiw/14098503571.pdfIn PDF document text
    • http://goviragukipi.epizy.com/how_to_make_him_fall_in_love_with_me_again.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_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 4940 bytes
SHA-256: 689d72d71615da2899990fb56bd12f1ff75ee6128f4c866a7230b5876e8f88a5
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 10440 bytes
SHA-256: 37652c605cc5e86b3818e23760c1e43f5f0a018c42c755210dbe81bbcfdafdfa

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