Malicious PDF — malware analysis report

Static analysis result for SHA-256 307bbfc438684e5f…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 05:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 147b519c81963bf368a68c53eb2af4b5 SHA-1: 4db05f2de44525ceee82a00e1db9a9467c7e3535 SHA-256: 307bbfc438684e5f8a01c6f6f0e54b94f082adfebcc5adcb2709a7b968bb9fbe
144 Risk Score

Malware Insights

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

The file is a PDF that contains a lure for a free download, indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. It directs users to a suspicious URL, 'https://leonvi.ru/123?utm_term=the+minister%2527s+black+veil+quiz+pdf', which is likely part of a phishing or malware distribution scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further confirming its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://leonvi.ru/123?utm_term=the+minister%2527s+black+veil+quiz+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401972/normal_60339379eea47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459941/normal_5ffe9927761bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_6022062c08f44.pdfIn PDF document text
    • http://blekrossi.ru/jomajipoxasirojemoqjr19.pdfIn PDF document text
    • http://unosital.space/magic_the_gathering_card_makerfkgs9.pdfIn PDF document text
    • http://segikusi.22web.org/45911740855.pdfIn PDF document text
    • http://richteam.site/logebolalodedumiretato7at.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/vunizi/72384602686.pdfIn PDF document text
    • http://rajakoxefulume.epizy.com/72668516183.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/what_do_i_need_to_do_to_prepare_for_an_echocardiogram.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/hollywood_movies_in_tamil_dubbed_full.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/objectives_and_functions_of_wto.pdfIn PDF document text
    • http://tapanowi.epizy.com/o_p_c_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/sheet_vinyl_flash_cove_base.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/bts_dna_choreography_mp4.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/46488681931.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_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 5820 bytes
SHA-256: 1ea38f3c48e4e611579d0c32763556e87f0ee3f38c06fd86129c765ce936328f
font_01_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10536 bytes
SHA-256: 02f3949bef252ce2bdc5282514dc205ca54f8831517dd75bda8d406ce61f2aee