Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e875df8f370b65a…

MALICIOUS

PDF

47.2 KB Created: 2020-09-17 16:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8d7c1ce226bba2acd4a9d3fba135f25e SHA-1: 2e43d351ca00bab4741429ab30c8413a44ae557d SHA-256: 6e875df8f370b65ae6c50f4c701fe533225490f132fa43b7146fce47d973564e
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.cc/wix?keyword=algebra+1+common+core+june+2016+answers In PDF document text
    • http://sofitova.dreamstodegree.com/uploads/1/3/0/7/130775379/fovax.pdfIn PDF document text
    • http://silefe.jihyunhong.com/uploads/1/3/0/8/130814687/zizeginomuxavegi.pdfIn PDF document text
    • http://lizir.spmlsu.org/uploads/1/3/0/7/130775195/5646508.pdfIn PDF document text
    • http://files.tewksburybaptists.org/uploads/1/3/2/7/132711975/22d93687114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce2101ce-064f-4c61-8db6-4a745971f788.filesusr.com/ugd/a98ecc_7727e18ce5fc42ab831af11de7bf905d.pdf?index=trueIn PDF document text
    • https://878376b5-4ebe-450b-b89f-4b2cf2ddd5ab.filesusr.com/ugd/370021_447d2f6dafa848c08e096af39ef22921.pdf?index=trueIn PDF document text
    • https://d939dcd7-22fb-40da-9fad-a74316655a58.filesusr.com/ugd/53c654_6e53f001e63b46ffa523bc37225931a2.pdf?index=trueIn PDF document text
    • https://d0486cff-5b52-4604-9d05-3688dd35573f.filesusr.com/ugd/b48b60_342ea74d7d3442469fa7567e06e785e6.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9967/6060/files/jacksonville_jaguars_2017_injury_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/associacao_de_geradores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/49422245964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/2.6_algebraic_proof_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/pasisipeniguxotideveb.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_off0000776e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 5896 bytes
SHA-256: a55392e0ed84756d6472d1cdc27d83258576c705bcb02e3f9a5b9df8bdc9543e
font_01_sfnt_off00008b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B85 10636 bytes
SHA-256: 8e7ef30dcdae0e9400ee7a5b1f97e5c8779b716c78a4e0c9f3f79c403e21cc58

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