Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8d7f747d4d7a08…

MALICIOUS

PDF

72.7 KB Created: 2021-02-11 19:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c258672a4fb4e6ce75533e94591aca7 SHA-1: 7e7167d97ba506b0de6e2013b00be2810e23ca18 SHA-256: dc8d7f747d4d7a08df6592a0a787f9cb393a1e2ebea598b4b8f5dcef118bb286
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://baarspo.ru/123?utm_term=jardines+colgantes+de+babilonia PDF link annotation
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/2e88c.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/aidKgdc/color_wheel_game_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/jja1hih/sporosarcina_ureae_gram_stain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460247/normal_6000b2ec04bef.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/dgejgjh/8634775286.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/7268077.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/5jiJzY6/anime_girl_katana_wallpaper_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_601bb01ada9e5.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jh12Gja/43204802371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fdbe32265f5d.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/hjkMje9/froggers_menu_mount_dora.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/gcajfid/hits_song_2020_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/f4wwjeA/video_doorbell_without_cloud_storage.pdfIn PDF document text
    • http://medefoduma.iblogger.org/pogopizijova.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/fumiposamisur/xovejit.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_off0000dc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 5236 bytes
SHA-256: 804baf0084c34cdc1b93c3b090baa28d194ad7681c53b11683eaa5ff2b86f012
font_01_sfnt_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 11692 bytes
SHA-256: d6d0e3dcb2d774682fcfcfbaa3ddd272b6aac4a146ed406d3cd686bcfa576176