Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae3ff2f0442dd10…

MALICIOUS

PDF

45.8 KB Created: 2020-10-03 14:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e3d8dd0016c402fed41ccf450abb0dd5 SHA-1: f2e5ae3ca3847e982e0a531c9c4ec329843eaf77 SHA-256: cae3ff2f0442dd107387b70ee2a6000813fa60e3f4324f28172f85f2a7294375
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://cctraff.ru/strik?keyword=dogs+of+war+adrian+tchaikovsky+pdf In PDF document text
    • http://bemuwopem.danstriathlonsite.com/uploads/1/3/1/4/131407469/sajur_lafukutofik_kitedages.pdfIn PDF document text
    • http://files.jacksjewelry.com/uploads/1/3/1/8/131871462/zalixabogiba_jivuv_womegiz.pdfIn PDF document text
    • http://vapavoso.vickytrespando.com/uploads/1/3/0/7/130739353/6acf02517785.pdfIn PDF document text
    • http://files.stevehanleyhomes.com/uploads/1/3/2/6/132682684/wugowusiwo_diteja_xubasuwuruluwo.pdfIn PDF document text
    • http://roxisalej.raphastar.com/uploads/1/3/0/7/130775012/kajugav-lamofutemezi-kakerapikowop-bimutiso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d05e29e-84a7-4962-b0e9-7a30bd73ff25/31973590705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53478aa9-b192-419f-b246-93afdcf85272/wepivenezafifurinipagidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047c124a-057d-4e3a-9738-5c224e5f0b95/vizulugarivisan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbdcd883-abad-4a31-90e9-699b82453084/54138108914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c833a2-94f3-4fcc-9ebe-dda26f0ee851/feleviguli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2585/3348/files/52350699798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/warhammer_40k_map_of_terra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8488/7702/files/michael_vey_the_prisoner_of_cell_25_download.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_off00007417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 5700 bytes
SHA-256: 915843693344f10d7c3efb3bd6fd5113f65c371691e42be78373b87b8cb7a548
font_01_sfnt_off000087a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 10032 bytes
SHA-256: 54eb7c6f33ee5859ebebb074866bec32104eb52156c1bd073069c198f07ce4e5

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