Malicious PDF — malware analysis report

Static analysis result for SHA-256 f447c44361114df9…

MALICIOUS

PDF

71.8 KB Created: 2021-01-29 16:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7a668f2456c2ecd434f69a49cd137087 SHA-1: 6dc91c98817d5394dc9a90bf271bdc5324b047cc SHA-256: f447c44361114df9cbc5e68cc24df3dbab31afc42d9989c5d74aba2703950e69
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=unreal%20gun%20simulator%20builders PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367310/normal_5fed09a8b0014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473041/normal_5fee64203484e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_600aa202d0536.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/gdijdgg/double_triple_diamond_slot_machines_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/ieifhdj/top_offline_video_editing_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/AC6Kii8/tarot_cards_purchase_online.pdfIn PDF document text
    • http://bas-vorota.ru/america_east_basketball_tournament_schedulez528s.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/8jjgdii/8531285618.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/XaTumU4/wetokon.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/bih9myT/glitch_effect_photo_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/iegcqjh/business_strategy_for_property_management.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/Kjgvgg3/7885756538.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/wiazJic/nalunozadesibejux.pdfIn PDF document text
    • http://kawlites.online/machine_service_report_format_in_word21l0z.pdfIn PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/tivusofarofalod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 5276 bytes
SHA-256: 54edd99e71fc0c305d963a2c0f85edb4a92d808fd62050782eb295c468241c45
font_01_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 10520 bytes
SHA-256: fe8959fad71dddd898d08230e33514636fc6df42db941b980e3b724cdc1acdbb