Malicious PDF — malware analysis report

Static analysis result for SHA-256 7635700efab15530…

MALICIOUS

PDF

43.6 KB Created: 2020-10-20 23:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 79d44d43b6b10d35d48b7532d9a93f5b SHA-1: 9e36e426fd0633734c41f1cd25e8f8a895eca91f SHA-256: 7635700efab15530d5903143147f15ee73c802536a282dd7595c57c1f33b637e
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/pify?keyword=oauth+2.0+authentication+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8ec1e4a8b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f8e10e545cc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8b7c28b10d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/parefova.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/buzikodopekado.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/15908563418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f118d3-c3f8-4768-9bc0-8969a13eefd9/28621086185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d907a524-3f8d-4e29-bd69-206e802d5147/nedigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f5b8eb-e145-4904-af57-03cd14f6a64a/moxuwexarewiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8b6549-83b3-4577-9a03-3474f61208c0/alvin_and_the_chipmunks_2_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d3a866-82e0-4158-b7eb-dd9958308c49/76799141990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee8cd61-03a4-4e01-bdc3-38ed3b470db8/28837213132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c855fa6-614c-47b9-aef5-f74635ec395d/vedira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52be78fb-b4b7-45df-b1a6-016349c528bb/51759983460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8446e5c3-e66f-47d7-8956-50971cfc7c42/68047024025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c2b23b-8031-4ca1-b678-79e5b3578311/angle_bisector_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6897382a-a2e9-4bd1-9495-2eee7045666c/sabupinisivudexidopoxaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5229/4055/files/womens_electric_razor_walgreens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/37433080553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3126/5948/files/ram_charan_new_movie_hindi_dubbed_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_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 5152 bytes
SHA-256: e33141d04049c9642c3985f30352f875e00131537ffa25e998d42694e21a3bf5
font_01_sfnt_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 13916 bytes
SHA-256: 2b01c0194378db21b4948d75238206bc0668cf1db00ea83eb40e51e1c9c689b8

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