Malicious PDF — malware analysis report

Static analysis result for SHA-256 890262dec0e25b0b…

MALICIOUS

PDF

47.8 KB Created: 2020-10-15 15:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f5acc48b50d71c74edc429a1f7c2b2b5 SHA-1: 79debe3e5ac1c297dda470e75524e3e37dd78ae6 SHA-256: 890262dec0e25b0bba532b5e519b3670fb2c0571b0595f585a107bf3e466553a
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/123?keyword=language+arts+worksheets+4th+grade+free In PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4fab3e13.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/komabab.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/321e09c.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/4127892.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/selagu-wugixinoxule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f880ce3238c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873eb22840a.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/1/0497/3507/3943/files/mlb_attendance_2015_by_team.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2632/0040/files/purizakafekoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/modern_indian_political_thought_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/delta_drum_sander_ebay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/cartas_perdoname_por_ser_celoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58db2a4-56f3-474f-bd27-7d6e642fc7cc/xugibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d6d758-2fa5-4119-835b-2b6249a2bf5b/dananifuwadavug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5cc2b1-d1ec-41d4-a141-6f5e9b31854a/85529583686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10715b3a-2103-49c6-8bf2-83489ff0ae32/laregebuxorebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b401fa5-846b-41da-a2cd-f31e8c734599/rusiravejaz.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_off00007bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC 5324 bytes
SHA-256: a6597db5d180a136869f4b029e155bba4644703aa9b696974e34c2621c85cbd0
font_01_sfnt_off00008de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE0 10508 bytes
SHA-256: dfbda5d7020bc4ddd33255db230fb5fbc8b5c5e139ebacffbcbbaac9013158cb

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