Malicious PDF — malware analysis report

Static analysis result for SHA-256 78466f93717a64bd…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 09:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6b45f21ab3b6be6115d6e0cea6740993 SHA-1: e19b3a1491294f769fc2e5b5b10e9f887b3910da SHA-256: 78466f93717a64bd7435baec2425b5c36b30f8cf3ffc9bf5018a0d531e38fd73
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://jumiwimov.ru/award?keyword=the+game+movie+streaming+free PDF link annotation
    • https://cdn.sqhk.co/buxifuludo/hiwhijc/61952384300.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/bujewuxogeve_foneren.pdfIn PDF document text
    • https://cdn.sqhk.co/siboxowimu/Vic3B1X/zawia_rpg_map.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/PhbhhSW/49998186673.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/vnH0kih/extreme_landings_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/QyFibii/35745967289.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/genitijop.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/diguwenexumubejave.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/jdiggi7/62290807524.pdfIn PDF document text
    • https://zajuzazoni.weebly.com/uploads/1/3/4/8/134891144/tepusimof.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/Yjcagtw/raising_rank_insignia_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/iPjhGk1/dewawixapukijodinubik.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/KjbIzhi/fill_holes_in_drywall_before_painting.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/nepuwobawevem.pdfIn PDF document text
    • https://tuzuvujejoru.weebly.com/uploads/1/3/4/4/134442534/2331444.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_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 5160 bytes
SHA-256: e5be9d114e3a3cb54a3680bfe8966336930f1238a4cc596b117a09ce112d7fa4
font_01_sfnt_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 10184 bytes
SHA-256: aeddd067e90e7d6cdc933353bb613a08cbc947e1701675d3650ec6d47755c295