Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d339cbcf7416ad…

MALICIOUS

PDF

40.2 KB Created: 2020-10-28 10:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f640653dfb9d2f80a7048876e2173f6f SHA-1: 4584c20af3cd2958beaf34ca5421805dc7e9de61 SHA-256: 71d339cbcf7416ad2488c61325359699ab79a3040231f673beae514b7befc341
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.link/pify?keyword=mineral+point+middle+school+library In PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/9391702.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/pikefilin-poluni.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/2224335.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/e73a65407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f98794b645e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8bd57d1f13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f9735b7b60ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005c24.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005c24.bin)
    • https://s3.amazonaws.com/befarekogol/biodynamic_farming_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/85653126540.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nigusamulabuvefufufaregev.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/59263100134.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/sunowow.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/affairscloud_current_affairs_july_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/ikea_catalog_2018_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c21a106-195e-4e38-87d5-6217c73342fd/kisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f00049e-4afb-49cf-a4f0-b8e4d88eab0e/4540135993.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/adivinanzas_dificiles_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/jowajodog.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/ain_t_i_a_woman_revisiting_intersectionality.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/bupimujufovibeju.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/xufiduvovamozupo.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 extracted file (font_00_sfnt_off00005c24.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C24 5560 bytes
SHA-256: b962f95a4fa0aa1cfe405040759517c5c2b5535ef73fb01a75cce75a916e0997
font_01_sfnt_off00006ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 11208 bytes
SHA-256: 9a50c906bac717f7ff30ffb7f6e769191abddb1a89a420a1df99aaa57bca817d