Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ca9fbdd835ec0a…

MALICIOUS

PDF

69.8 KB Created: 2020-09-19 06:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 65de51e6dd1463dd5e3d9d231445ab25 SHA-1: 2371eef3e3dbfa387a915834bee3f8804573204e SHA-256: 15ca9fbdd835ec0ad8b2a8d7ca8b8bc0c1b9cb1c79d826f2bb6a7618c6d27901
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://ttraff.ru/wix?keyword=ceremony+5e+roll20 In PDF document text
    • http://fogam.norwegian-food.com/uploads/1/3/0/7/130775291/volavab.pdfIn PDF document text
    • http://remuwi.jessicaohanley.com/uploads/1/3/1/1/131163599/ee3889fc7.pdfIn PDF document text
    • http://wefuboro.bakersbirdshop.com/uploads/1/3/2/7/132740249/d37c944c7a.pdfIn PDF document text
    • http://files.rmhsperformingarts.com/uploads/1/3/1/4/131452836/3861647.pdfIn PDF document text
    • http://selugixi.constructionqualitycouncil.org/uploads/1/3/1/4/131408056/xukupumuzawuwa-kirevofij-gumivibokodomu.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/1/0437/2175/2731/files/algorithms_and_data_structures_using_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7991/6963/files/geography_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/woxedixunojurudejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4142/files/blog_de_libros_romanticos_adultos_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/936_483_2979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/67565306011.pdfIn PDF document text
    • https://27ab004d-cb3d-4de9-9f96-804e6287de85.filesusr.com/ugd/c79b1c_89d81097748a4f819112aea2b8b1a3aa.pdf?index=trueIn PDF document text
    • https://06642f15-867b-4f40-80e9-01569633d9b7.filesusr.com/ugd/53cfc7_3d9c287ae50e42bd8e34584b7dee252b.pdf?index=trueIn PDF document text
    • https://773ef88d-1138-4a1e-b619-871d5fb61b3b.filesusr.com/ugd/8a9bcc_e13c2caf5fe5457c93b5975c61aeae03.pdf?index=trueIn PDF document text
    • https://c2c20907-8900-4c30-8fe3-9568e24a452f.filesusr.com/ugd/2486b5_6367b4d7f6464b51b6b919d98be2ac72.pdf?index=trueIn PDF document text
    • https://128cec62-55dd-4386-ab65-5e255045830f.filesusr.com/ugd/370ea2_e1748e9ad39240f7b3f0182e6e23ba37.pdf?index=trueIn 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_off0000d523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD523 4848 bytes
SHA-256: e3e8eaed6e7fe1c2fbf979bc44f6f5d5fc174dd89add3d92e2ac3a8f1b7f2653
font_01_sfnt_off0000e593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 10648 bytes
SHA-256: a122d5ae223bdbdcc09fb76dc287839c93b44d24992423187acda7b8eef75eb1

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