Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e07d8b824f90627…

MALICIOUS

PDF

40.3 KB Created: 2020-10-16 19:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e4af4d08cb477b9038a931c7efccc636 SHA-1: ea76bdf241716806b6215d3a30feace0f0763a9e SHA-256: 9e07d8b824f90627327a9b0e8800ae4b0b0c0d8c8f95a715415c607887336c34
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=french+rooms+of+the+house+worksheet In PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/kezuwonita.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/2278369.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/4671102.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/5986981.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/xudusumevofej.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/podewafi_lamatuvowud_botemuzoxojabof_firamixivosib.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/d76b6fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87896348094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87272f84053.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/8a273b6.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/wefufurulatabod.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/1/0482/2083/1904/files/showbox_apk_download_latest_showbox_5.35_for_android_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2228/2663/files/76940590794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/jadodosasoxujaxijuviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8122/3332/files/sushi_go_card_game.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_off00006211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 4992 bytes
SHA-256: f72a708d632000eba048dc6be26bc2fb3861942c619c3056e3e468e1e170d3dd
font_01_sfnt_off000072ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 9780 bytes
SHA-256: fef0bb014c47a2fd9514d7f83c033cd78b4778cb78a8533ca19d4cb4c5df1624

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