Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2efc421988eda1…

MALICIOUS

PDF

76.7 KB Created: 2021-03-08 02:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8fef364bfca4a8caac823a1e36ca3430 SHA-1: af629a8410be3bfecf279afc46e3850c167af802 SHA-256: 4a2efc421988eda1e3a2245c163659cdb6f0c25c5cf7ea7090779b4f7f841047
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it uses an image lure for a free-download phishing scheme. The primary malicious URL identified is 'https://jumiwimov.ru/wix?keyword=connecting+with+the+arcturians+pdf', which is likely used to redirect users to a payload. No scripts were extracted, but the PDF structure and URL suggest a phishing attempt to deliver a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=connecting+with+the+arcturians+pdf PDF link annotation
    • http://winoraama.fun/79889635872nm9t9.pdfIn PDF document text
    • http://worldhold.online/70936137240lro5d.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/e34JhhA/97167603135.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/BIieGjd/60730977611.pdfIn PDF document text
    • http://vitalia-transports.com/porta_manual_de_postureo_letran2hf6.pdfIn PDF document text
    • http://dimax.website/mixed_second_and_third_conditionals_exercisesvktxk.pdfIn PDF document text
    • https://cdn.sqhk.co/zudatona/XheKjc8/zeviloxekeluxaked.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/icFhia6/fumonozodagonudelefe.pdfIn PDF document text
    • http://pipvip.ru/87329050017n975s.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/K0ZdVjj/13678408928.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/rabewiruzitewa/leave_letter_format_for_college.pdfIn PDF document text
    • http://jidaxel.rf.gd/byousoku_5_centimeter_sub_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56c55ec-cf5d-4f14-a2f4-d4589880cd17/tusavo.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/zemed.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/biblia_chomikuj.pdfIn PDF document text
    • http://vigukesege.epizy.com/gusowug.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/samsung_chromebook_xe500c13_user_manual.pdfIn PDF document text
    • http://fajesunuk.rf.gd/mirazupolizen.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/how_much_money_does_brandon_sanderson_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0c5e6d-ea6d-440b-8b41-7c881a5f9524/how_to_program_defiant_electronic_deadbolt.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/90831947293.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/moon_river_ranch_wedding_venue.pdfIn PDF document text
    • http://nixawoxikoni.epizy.com/11332169635.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_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 5380 bytes
SHA-256: 8fd40693debeed48098fa8181d0d106c03f3388ea903eae88dbcb4db80fd7f8a
font_01_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 10924 bytes
SHA-256: c2f4cef6d25163e15319c789499b71e57f21c242ee5a818baad69c42ec2acc80

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