Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc81f9dd2777e79…

MALICIOUS

PDF

64.0 KB Created: 2022-07-19 00:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: a818000b82493db8309dd1b6f98e8194 SHA-1: ce2ce74f1f3c0a1c5698bf4ddf9ddb67e496c5bd SHA-256: 3bc81f9dd2777e796e40f814c61766146bc815c4a84b260ab9f45d48ed9170ae
114 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 6

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.saito-ken.jp/userdata/file/56950144088.pdf In PDF document text
    • http://royalvisas.com/fcs/userfiles/file/wuwija.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/52704219656.pdfIn PDF document text
    • http://rafis-kadyrov.ru/uploads/files/29607965031.pdfIn PDF document text
    • http://iscyber.com/userfiles/file/gurawelipugajojane.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/guxorexawizujorafejor.pdfIn PDF document text
    • https://www.hotelashray.in/kcfinder/upload/files/17097186753.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/162cb004880ee9---vipojutezemipaketupoki.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/fetepifakigum.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1620e7174aa47e---siwirojefimupik.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623794571535e---vejimibu.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/77766175347.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/zozuxatikosetilupono.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/40853259877.pdfIn PDF document text
    • http://gardatrans.com/content/Files/xareraxusikumekijuzebusa.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/xatetofinedorulewovij.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/19697409564.pdfIn PDF document text
    • https://astra-rus.ru/media-temp/img/uploads/files/40659268377.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/61784476563.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/34004040666.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6f1483b28c6e90a22ca4b4d1d0274d89/92167799816.pdfIn PDF document text
    • http://svetlydom74.ru/admin/kcfinder/upload/files/tuwulubowopitofazulozu.pdfIn PDF document text
    • http://atelier-tilia.cz/userfiles/files/34709057329.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/73929120978.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/162b6b1456b8f3---jufemipivimizik.pdfIn PDF document text
    • https://aademvegabaja.org/images/image/lakabizirupi.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/sabawitovebegafupip.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/kedexepevakavelezatasel.pdfIn PDF document text
    • http://oalroax.com/c3?utm_term=wegmans+food+markets+case+study+answers+pdf+format+template+freePDF link annotation
    • https://static1.squarespace.com/static/60aaf27c8bac0413e6f804fa/t/62bc1dfc7a8f95070daf19f1/1656495613677/detective_conan_the_fourteenth_target_wiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aeb86718479732845b7b4/t/62c3ca7331a4b61bf056eb8a/1656998516237/88898912718.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aaf27c8bac0413e6f804fa/t/62bfb613b61ab307bd3aca8b/1656731155683/70031619991.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aaf25e42d7b60106dc17aa/t/62c1e3aecf740c2a5f529835/1656873902714/www_siicex_caaarem_gob_mx.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aaf27c8bac0413e6f804fa/t/62b2ed14c8a30f59cea3eab2/1655893268776/challenger_explosion_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aea6a97201213e037dc4e/t/62cc1b0569660d4a47472776/1657543429837/gucci_mission_statement.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aea6a97201213e037dc4e/t/62b6c6d316eb1d4dd6a7838d/1656145619832/50876140425.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aeb86718479732845b7b4/t/62c0f1dbb61ab307bd52ab31/1656811996264/medieval_2_total_war_crusade.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aeb86718479732845b7b4/t/62d165a05abdf701bbabfba1/1657890209087/27817760971.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aaf27c8bac0413e6f804fa/t/62bc6557d49c196259a09cbe/1656513879613/vugakipotidiposotopuzipa.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aaf25e42d7b60106dc17aa/t/62bd4bff24ed2a63f30ece49/1656572928175/houston_country_club_dues.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aea6a97201213e037dc4e/t/62cc2b35af9d980ae039d654/1657547573618/continuous_and_discrete_signals_and.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aec14af289a5f7a539cf5/t/62be59a6a219875f1f24c2f1/1656641959191/kikijimige.pdfIn PDF document text
    • https://static1.squarespace.com/static/604aec14af289a5f7a539cf5/t/62c36dab655ca264088b1aab/1656974763180/pan_card_lost_application_form_indi.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000a76e.bin)
    +1 more URL(s)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA76E 11256 bytes
SHA-256: 259231c3a6c4523a75fbd669d9d3fe0168449c5a8ef02d47f5a1904e618335e7
font_01_sfnt_off0000c1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C2 17920 bytes
SHA-256: 10a1d04d110ae889ccd840f0fdb8b575c977e2a0366c1f8a401187559b747c23