Malicious PDF — malware analysis report

Static analysis result for SHA-256 53649dc824093065…

MALICIOUS

PDF

75.7 KB Created: 2021-03-06 00:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 629c6cd46e0fe73e5fdc1622d2f63d13 SHA-1: 3f52c8228116ed0ffa9e4a63f92a3ab66f86184d SHA-256: 53649dc82409306542bb1f0fc170183efa7f8e589b23b427ad3334281fb5fb8e
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary lure appears to be a search result for "How many months does it take to become a medical assistant", which redirects to a malicious URL. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/strik?utm_term=how+many+months+does+it+take+to+become+a+medical+assistant PDF link annotation
    • http://jonipifenukiz.mygamesonline.org/dapegobuledobipaluvepeku.pdfIn PDF document text
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/384f9e8e236f2d.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/bolexutibe.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/jhjg1hg/90s_dance_music_playlist_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/wRijjco/christmas_runner_kits.pdfIn PDF document text
    • https://cdn.sqhk.co/narivujuraf/gjbHQhd/coming_to_america_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/hAzl97k/black_forest_cake_design_heart_shape.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/77774591954.pdfIn PDF document text
    • https://ruxelasukosife.weebly.com/uploads/1/3/4/6/134667582/d48481f7.pdfIn PDF document text
    • http://fekowepiz.mywebcommunity.org/jokefulozekotubil.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/eqjiicZ/cult_of_chucky_trailer_reaction.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/start_late_finish_rich_summary.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/sezebepit/lukuketadonobu.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/vabovowibuxutejiwamoke.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/56532301433.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/fevonabegidigikumo.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/html_form_templates_angularjs.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/musculos_antagonistas_y_agonistas.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/caracteristicas_de_los_modos_de_produccion_capitalista.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/gujarati_balgeet_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/gb_instagram_apk_latest_version_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/best_dressup_and_makeup_games_apk.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_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 5440 bytes
SHA-256: de467196f48e601edb95b1c68485eb28cbd3a1513c311502d79a0fa0fd3a9bf6
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 9960 bytes
SHA-256: 0d96cbb428e3e58753383695873411419b1288daf3c5f53fdce2c48559ca12bb

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