Malicious PDF — malware analysis report

Static analysis result for SHA-256 686300f3617a3c45…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 07:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: dfe6124386e60ffe0ff9c098f57bb6da SHA-1: ffc903b04e2af1d2ca0a2c8b09c9d4b47fbdf1ef SHA-256: 686300f3617a3c45256d1897c22837e6513debebe0ed22971b33d9f330e6b169
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.me/123?keyword=amoeba+sisters+prokaryotes+and+eukaryotes+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8eff4f61e6e.pdfIn PDF document text
    • https://wiwawuvagowe.weebly.com/uploads/1/3/4/4/134496439/b92f2e1fc.pdfIn PDF document text
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/folazujos.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/7712138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f91f2b44bc1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f98e95b83b0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/64872988839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/64978792833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0652/9175/files/family_and_friends_6_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5185/0165/files/69594283857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5135/9642/files/python_gtk_example_github.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/apj_abdul_kalam_books_in_marathi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/vapakovawelujigaraserubi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/ninugakir.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/solving_equations_with_fractional_coefficients_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/xeliforojenikigipifuwop.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/felojobedoxesafaxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 5436 bytes
SHA-256: b78611c6698f5611bfff61c2ff458db18e9213e410cc56b9f08e2e15a5f1d5da
font_01_sfnt_off00007921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 11448 bytes
SHA-256: 7ba1163e5db69eb7c50bf963ba416a18ebc4eeebd0b0b75b83af7f4ad03efa43
font_02_sfnt_off0000a022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA022 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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