Malicious PDF — malware analysis report

Static analysis result for SHA-256 d591d273f76c214d…

MALICIOUS

PDF

72.2 KB Created: 2021-03-19 11:25:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb4f45337a1c711451259d394138a0e SHA-1: 10db912971e1ba54a3ea628757cd605923f5f88a SHA-256: d591d273f76c214d1636830b69b4a50151ba4bddde05d6f78e1d91f718dbf135
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier also flagged this file as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8413

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/award?keyword=find+command+in+unix+pdf PDF link annotation
    • https://bakusiluvusefe.weebly.com/uploads/1/3/5/3/135309983/kavoboras-xewalanewagusaz-xeninasilubuke-vavamaledetibo.pdfIn PDF document text
    • http://sebofafekorav.iblogger.org/wutifenavizoxe.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/kezixa-fivabizer.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/5geDktQ/mawubika.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/ijeHZhg/wii_u_emulator_download_for_pc.pdfIn PDF document text
    • https://danawojigu.weebly.com/uploads/1/3/1/4/131407111/kanefelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ce7435-5d0b-4b4e-8ba3-2bf5ffb16a82/best_way_to_do_predictive_analytics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0acef02-17d3-4840-ac15-01ea79aa7a1f/55345741018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cac0ac-e017-42ff-a2d3-8640f6b25fa1/how_do_i_reset_my_allison_transmission_filter_life.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_3f49ae3c9fbe436bb633cc3e57231361.pdf?index=trueIn PDF document text
    • http://veguxakafopuvix.epizy.com/jivufisovudopuxirobomivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1bd19b-435d-414c-9073-a3518ae4b083/famous_quotes_of_zig_ziglar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f361ac1-704d-4a02-b955-ddceb2ea112a/ariana_grande_song_lyrics_7_rings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e230ebfe-76af-482b-a576-d18506f2e2b9/43693915588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843adbf5-9d0d-4c05-9aa0-81758b81eb29/how_much_does_a_claims_adjuster_make_at_progressive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97e5d87-4890-4039-a1cc-8bcf43cc4262/cloud_computing_jobs_reddit.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_26f9cddc1fce49ce83bf6f5d2d9e9055.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b56d17-ecf0-4732-9946-1c9d45154d53/v_for_vendetta_comic_synopsis.pdfIn 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_off0000ea9e.bin
65ea5f447c29b35a79306e66c3ae716291cf9421eb7c03004aa3ee2f7fbf8a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 5016 bytes
font_01_sfnt_off0000fba9.bin
3ef5faa6a577ab6b2a834c5784c99b55c3e9b05026224333f0ddfbe6da6e3be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 11608 bytes

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