Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fbee40a863b665…

MALICIOUS

PDF

55.6 KB Created: 2020-09-30 04:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d270345f5d555fee221ef5aaf91daf88 SHA-1: e540f2df3599fbc4e7381b54a1ae8b842453412d SHA-256: d9fbee40a863b66569b707f00b5e01afaff6b63304b2bbecc4460744ca2a99a1
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/pify?keyword=cube+world+pet+food+seed+list In PDF document text
    • http://juvavas.techniprodec.com/uploads/1/3/1/4/131438405/wovinilavuvega_makegusupe_wojufijipasese_jerumavivu.pdfIn PDF document text
    • http://files.jtygergames.com/uploads/1/3/0/8/130813612/52f7acc7.pdfIn PDF document text
    • http://vorokeb.mobileautorepairsolutions.com/uploads/1/3/1/4/131483154/zizotisareveze-lezuwake-jilidawuj-tojizepati.pdfIn PDF document text
    • http://files.stacygardner.ca/uploads/1/3/1/4/131406935/ccd6ca2aa28472.pdfIn PDF document text
    • http://files.hermonpresbyterian.org/uploads/1/3/1/4/131437409/0709b0d5b.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/1/0438/2038/4416/files/bumper_offer_telugu_audio_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/toguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/72506502437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/duzoliwanule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcfbdf7-31ed-4893-9a2e-8095bfd5d8d2/16794568297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff9c21b-0643-494d-945d-8c0fd64aeb28/bibetofibubawofigenadoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3207fb-6dbf-4b84-abb6-00d661d8c93b/64510390336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2819ba8d-c5da-46f9-8934-02f341e94a2e/rimevosukivijogijetoliwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986650b6-6fe0-447c-88a3-d64e570b16d3/24331737100.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_off0000912a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912A 4960 bytes
SHA-256: 9444ef758c9b1c029e69cc42a34a7bd3f80f9edbf411aa4af1f33ab5b798dbc1
font_01_sfnt_off0000a220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA220 15304 bytes
SHA-256: d665a6fa4174afededae0b06a638a23381656dd8fe1929d559eeda6721db9a08

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