Malicious PDF — malware analysis report

Static analysis result for SHA-256 c341d107b05d9d1b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 18:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39a6828f496bf891a48fd113262847b8 SHA-1: 49ef85e04ac35012284e8d08e67dccb7888bb826 SHA-256: c341d107b05d9d1b7b6ed28f1a63bcdf3d4563b21eb0918fa5c80d5329b04738
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised with a keyword suggesting educational content. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xezojetit.ru/award?keyword=spelling+bee+activities+pdf PDF link annotation
    • https://cdn.sqhk.co/zotofoza/haedheC/bopemegukofazetonew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_602afd1978b9c.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/bright_line_eating_meals_on_the_go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fd0eb463d493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_5fe78c5cada7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fcf3dfa54939.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/elvPgeU/99389794287.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/p2jbXgi/faux_wood_wallpaper_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_603a537e71992.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/90289648078.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/tcs_email_writing_questions_with_answers_download.pdfIn PDF document text
    • https://cdn.sqhk.co/giboxikewev/Tjahegd/19116984949.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/iggjdN8/hyrule_warriors_characters_using_other_weapons.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/WiebFcH/mindshift_control_panel_login.pdfIn PDF document text
    • https://cdn.sqhk.co/fujikapoji/OuhfB4Z/52855564930.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/mejados/latex_curriculum_vitae_template_stanford.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/back_to_sender_lyrics.pdfIn PDF document text
    • http://dijuforuzukogem.rf.gd/old_school_bodybuilding_diet.pdfIn PDF document text
    • http://dawovizi.epizy.com/shapes_worksheets_for_grade_1_printable.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/bsa_merit_badge_pamphlets.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/twitter_videos_app_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/44240366901.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/75995119632.pdfIn PDF document text
    • http://feniboladesa.rf.gd/witenukinaguwugukomelogo.pdfIn PDF document text
    • http://zezoverirokumom.rf.gd/40961281014.pdfIn PDF document text
    • http://vobafuge.epizy.com/zibenezozu.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_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 5532 bytes
SHA-256: bc53a3e557e9de837aeb3fd64771a02df00ab5e0ee9b68b9f95c95e7ff80d45d
font_01_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 11100 bytes
SHA-256: 87fbd65172a0403a1c6b3d41b554063858ed0709bf469780c8e1a7fb5204e79b

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