Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db5ef8612fd864d…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 03:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 413ef9af6dcf5d3e94e6464ab9d57f25 SHA-1: 93cb8bf612144cbd64fa8f24aee0cb24cbf28f09 SHA-256: 1db5ef8612fd864dda3f6f53a946043782b662623a47b5df9cc4bd62346dd454
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/wb?keyword=how%20long%20do%20kerosene%20heaters%20last PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5ffcb595b87f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_600a736ed0dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_601f55817e6dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_6026fb393c184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5fe0260c7db0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450048/normal_5fe53b06379ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5ff6bfafbbc25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fe3f7749cfa5.pdfIn PDF document text
    • http://bigchance.pw/31356285003iyi39.pdfIn PDF document text
    • http://edevletorg.com/curse_of_the_werewolves_full_apko639g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465131/normal_60008688c5120.pdfIn PDF document text
    • http://ximilakuxulo.iblogger.org/37177593472.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/d8jgget/65538628094.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/NhjfJhf/sell_gift_card_and_get_bitcoin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_5fe4b2659c8bb.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/74892113973ipgzy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daforewepon.epizy.com/ata_chapters_and_subchapters.pdfIn PDF document text
    • http://jofosomorigifo.rf.gd/68437238363.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_off0000e20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20A 5204 bytes
SHA-256: 2d58dd82e0a3a05267cf713d7373d72a6ee6c6e7be0fa4a339e66f49d83210e4
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 10564 bytes
SHA-256: f03394851b32848d66b66c6ef80939393aa05b8d99d291262a8e2dd42af6c533