Malicious PDF — malware analysis report

Static analysis result for SHA-256 652fd920166c71ba…

MALICIOUS

PDF

71.9 KB Created: 2021-02-10 07:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7d05bbf73cb2eb3f15fe9d735f8f871d SHA-1: 135943e8855ba09d10c47f724fdda0f13837065d SHA-256: 652fd920166c71bab157b347de85d54b1eb3e6d4a099d80a3656e41927c35be1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://leonvi.ru/wb?keyword=figurative%20language%20worksheet%20first%20grade PDF link annotation
    • https://cdn.sqhk.co/sujubowip/ia8vWHe/clicker_heroes_2_wikipedia.pdfIn PDF document text
    • http://blue-tick-central.com/4272586560euk7f.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/I7ihjdr/bet9ja_old_mobile_coupon_check_ristechy.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/hggfwif/top_100_bollywood_songs_2019_2018_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/i7Kgdlb/cloudflare_status_code_520.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/gdvUibs/dominoes_game_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bomagomax/ghifdmB/taxi_taxi_3d_tv_games.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/bDAjdKk/xazeta.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/653e4bf7a641a96.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/hfhfHgg/ranking_list_excel.pdfIn PDF document text
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/xiwaji.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/jfhdhim/retro_arcade_game_controller_games_list.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/brDj6jd/40466579853.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/salek_jixodaj_zivulenijagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nogomazarem.epizy.com/fjord_norway_travel_guide_2018.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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 5340 bytes
SHA-256: c3abd335152f2857b61b56d59466ab6822e83725bd6814bb8fa3983bdc8d6ab9
font_01_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 10912 bytes
SHA-256: 3e88ad4e7a7778d6d54e72467b5734a41d12e1f62358b58b8a926383aee51415