Malicious PDF — malware analysis report

Static analysis result for SHA-256 206eb1465fcd3c8f…

MALICIOUS

PDF

102.2 KB Created: 2021-02-10 15:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a0440b9d847f7692ac2a53932d21149e SHA-1: fa6310e79ac000be681aeea52cc9366bc3e1c57e SHA-256: 206eb1465fcd3c8f08c5016c5a9f55f0ebad1c3c29bf79cddcbf0567a6c245a4
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are consistent with a phishing lure attempting to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=the+amoeba+sisters+the+cell+cycle+and+cancer+video+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fca0429b1d9a.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/UUhdfjj/mafiba.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/hghihgB/steamship_authority_nantucket_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/jdjhOJa/fifejojutuxomelo.pdfIn PDF document text
    • http://vemasujananexu.22web.org/45220337217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fc6b54592593.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/jajeib1/bibafozatosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_600af692918b4.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/SKmGcgh/to_do_list_microsoft_office_template.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/5jjDg5E/towitexili.pdfIn PDF document text
    • https://cdn.sqhk.co/xezexasag/hfhbNTf/gakuzakiwuluwisiwuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/9uGfGif/36071134943.pdfIn PDF document text
    • http://seluluxafej.22web.org/dodebakiduzopokivu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/kSPhiTt/bubble_shooter_tournament.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/ifeODie/new_york_city_fc_academy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pugasixowofizij.epizy.com/fegutiluporisebora.pdfIn PDF document text
    • http://terefikug.epizy.com/kabifopusixani.pdfIn PDF document text
    • http://sawelisibov.rf.gd/videocon_d2h_application.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_off000154d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D5 5584 bytes
SHA-256: 0c412091c00278f9b43bf8dbc8bf04f96a6e68fa5b3921a8c20fa803ad0128f4
font_01_sfnt_off000167bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BD 10240 bytes
SHA-256: d010e8f1127e3a8ab341d4edf43dce63fd7031de15d02effe4e551647c81049b

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