Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dd6476f0beeb82…

MALICIOUS

PDF

71.6 KB Created: 2021-03-14 00:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f85e2a476998d1ad0714e1e20caf142d SHA-1: 5cbef7d35abc353ae4a4a58e041a2c9df8c6734f SHA-256: 80dd6476f0beeb82912e2ca52a2766454ad68e14db2d120752ee880dff9758e9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=bnf+75+pdf+free+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413122/normal_5feeaffbc0b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389353/normal_5fee5520b8113.pdfIn PDF document text
    • http://hotloveme.online/agatha_christie_books_curtain_poirots_last_case3gqyr.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/didgi8Q/fojodomerupitisam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473322/normal_604b44d0b5676.pdfIn PDF document text
    • http://mnogoturov.com/guwuvizipidemavej65ccl.pdfIn PDF document text
    • http://rusherx.studio/manache_shlok_marathianj9f.pdfIn PDF document text
    • https://cdn.sqhk.co/finelega/jivgihj/36190248581.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/xamibebulosaxug/cipherlab_scanner_1504_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/tamako.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/advantages_of_learning_english_language.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/loi_binomiale_formule_terminale_es.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/join_files_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/what_is_wifi_speed_ac1200.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/90486887340.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/associer_des_mac.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_off0000d8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D5 5200 bytes
SHA-256: b289820f8d03e571d3c7a4313ee9c3eb03894f7d387768908038f56def921c42
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 11320 bytes
SHA-256: b82bae97a5caeb67a7ba6e7cc0cd3d3957d60bfcdf3c11075083803624516c1a