Malicious PDF — malware analysis report

Static analysis result for SHA-256 248bc6b4f08a35e7…

MALICIOUS

PDF

141.8 KB Created: 2021-03-27 16:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8c7f28e4f001f87eedd927265496e27 SHA-1: 559d51715b1128b90284abeb1bd9b693f2611d7f SHA-256: 248bc6b4f08a35e7ce281db1015ae7c48e0bb398ced9f8aa93b4746241f7093f
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains an embedded URI and a high-severity heuristic indicating an SEO redirector, likely used for phishing or to deliver a second-stage payload. The ML classifier strongly suggests malicious intent. No scripts were extracted, but the presence of external links points to a download or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://midufefew.ru/award?keyword=amir+cardiologia+pdf PDF link annotation
    • http://winoraama.website/In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373992/normal_5fc5a11f62438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458407/normal_6056ee677d320.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/cgeNiaP/chatham_emergency_services_salary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fe2504df3452.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/c3haa70/zombie_apocalypse_weapon_of_choice_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/hfgfVjd/vifazugalazukibabil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_6054fecf251f9.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/igijbje/camera_capture_image_android.pdfIn PDF document text
    • http://akvatehnika74.ru/the_tipping_point_chapter_5_summary6lh8a.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/OIhdzhf/parental_control_app_location_tracker_famisafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_6031b898eac8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6046f02ca4970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_5fe081546d247.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/XqbgZLd/nemevug.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/7rji5QI/bafg_berlin_formblatt_3.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/ihjkvia/barbie_granny_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_600a9dd21f972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_600392b4ccd6c.pdfIn PDF document text
    • http://grandov.pro/53684762883112ki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_602af924e7a7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001e80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E80D 5284 bytes
SHA-256: 74ea4b787dbbd58f515a8d040c326f7dd6027238dbc66a3082cbe84695480cee
font_01_sfnt_off0001f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9F2 14480 bytes
SHA-256: 8b4acb878212fbf81d95c664024d6257bd79331d286c4e4cf7b39371fbd6de6b

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