Malicious PDF — malware analysis report

Static analysis result for SHA-256 300dcb0f7f724d86…

MALICIOUS

PDF

41.9 KB Created: 2020-10-02 10:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: efccac9db3b0cc4862bb268a0e8e7281 SHA-1: 29a6742c9784c1836f33bf282ff3d106588e5762 SHA-256: 300dcb0f7f724d86241c3a08b83d79b3a800eef2512a29d9a84d9f3dd8aad1b1
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://ggtraff.ru/strik?keyword=obstacle+avoiding+robot+using+arduino+pdf In PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/4799888572.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/sifokekaroritakeziwug.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/lixexuguwonasinuxeso.pdfIn PDF document text
    • http://files.shapenebraska.org/uploads/1/3/0/8/130814967/zokiberarijizipe.pdfIn PDF document text
    • http://wubig.srsevern.com/uploads/1/3/0/9/130969663/08c6c8.pdfIn PDF document text
    • http://lupenovev.barrystaxidermy.net/uploads/1/3/0/7/130738799/fegisake.pdfIn PDF document text
    • http://sugexez.openthedoorleadership.com/uploads/1/3/1/4/131453558/dadixexoxovore_zezax_zigitetob.pdfIn PDF document text
    • http://welisoriw.mckaychurchsupply.com/uploads/1/3/2/6/132683071/resupalupup.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/dukuvodowukiduxavibof.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/xakiwadofawevum.pdfIn PDF document text
    • https://site-1038508.mozfiles.com/files/1038508/fanipilekatom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6499/7526/files/national_ap_testing_dates_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7622/2621/files/fiwakubusabunapujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/the_silver_eyes_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/merajizafamosukotovinora.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_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 5548 bytes
SHA-256: 85cd85af37c7901585d9d8dee592c32f21069bf54305db69e9d8a6477f040adb
font_01_sfnt_off000074ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 10984 bytes
SHA-256: d708c94370673ccd4c7f730e1678b823a705923c59249fa58d5298b187111469

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