Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2b5fb626e09072…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 11:25:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b70cc3964c21b2b7e3e0af18e9da15 SHA-1: 718c884f951842352cb9c0641d8e86752c5e18b6 SHA-256: fd2b5fb626e09072e89419fcc607badc64f69a4e8ab785785c9bad8c22473374
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or SEO spam attempt. It contains numerous external links, many of which point to other PDF documents, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=find+command+in+unix+pdf
    • https://bakusiluvusefe.weebly.com/uploads/1/3/5/3/135309983/kavoboras-xewalanewagusaz-xeninasilubuke-vavamaledetibo.pdf
    • http://sebofafekorav.iblogger.org/wutifenavizoxe.pdf
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/kezixa-fivabizer.pdf
    • https://cdn.sqhk.co/wifinalimow/5geDktQ/mawubika.pdf
    • https://cdn.sqhk.co/tevimuwijile/ijeHZhg/wii_u_emulator_download_for_pc.pdf
    • https://danawojigu.weebly.com/uploads/1/3/1/4/131407111/kanefelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a1ce7435-5d0b-4b4e-8ba3-2bf5ffb16a82/best_way_to_do_predictive_analytics.pdf
    • https://uploads.strikinglycdn.com/files/f0acef02-17d3-4840-ac15-01ea79aa7a1f/55345741018.pdf
    • https://uploads.strikinglycdn.com/files/01cac0ac-e017-42ff-a2d3-8640f6b25fa1/how_do_i_reset_my_allison_transmission_filter_life.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_3f49ae3c9fbe436bb633cc3e57231361.pdf?index=true
    • http://veguxakafopuvix.epizy.com/jivufisovudopuxirobomivi.pdf
    • https://uploads.strikinglycdn.com/files/ef1bd19b-435d-414c-9073-a3518ae4b083/famous_quotes_of_zig_ziglar.pdf
    • https://uploads.strikinglycdn.com/files/9f361ac1-704d-4a02-b955-ddceb2ea112a/ariana_grande_song_lyrics_7_rings.pdf
    • https://uploads.strikinglycdn.com/files/e230ebfe-76af-482b-a576-d18506f2e2b9/43693915588.pdf
    • https://uploads.strikinglycdn.com/files/843adbf5-9d0d-4c05-9aa0-81758b81eb29/how_much_does_a_claims_adjuster_make_at_progressive.pdf
    • https://uploads.strikinglycdn.com/files/f97e5d87-4890-4039-a1cc-8bcf43cc4262/cloud_computing_jobs_reddit.pdf
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_26f9cddc1fce49ce83bf6f5d2d9e9055.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f2b56d17-ecf0-4732-9946-1c9d45154d53/v_for_vendetta_comic_synopsis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

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

Open this report in the interactive analyzer, or submit your own file for analysis.