Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6165f94cadb6e1…

MALICIOUS

PDF

44.0 KB Created: 2020-10-17 01:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7eef868de42e53213b682fb60716cc80 SHA-1: 6681aca6e290a1e476af1dbf6706bb3abde68ca9 SHA-256: 4c6165f94cadb6e13cc1ade6f439fdcce06bde14179f089f02a8b18bf01f672b
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.com/123?keyword=human+evolution+worksheet+pdf In PDF document text
    • https://gutugifowofe.weebly.com/uploads/1/3/1/6/131606479/zanarutoverurinewa.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/94713876.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/498459.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/ruvewa.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/wujuzidafek-vofux-buxofavewubo.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/fakezu.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/weveli.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/1/0496/0990/0184/files/52799426361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/best_skyrim_load_order_xbox_one_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5629/9671/files/body_ecology_quick-start_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0204/2789/files/35529558120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e483097d-6be6-42db-883a-258cc963f426/51474853191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01487c3-90c4-4f90-8bea-385af22810e9/gaperavixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/oxford_english_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/zajunejekemikexipivew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/jakedofetinulibawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3455/7602/files/xosajemesojuwopafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1591/2098/files/basic_engine_terminology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6384/9372/files/suzewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/82475520643.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_off00006e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E96 5460 bytes
SHA-256: e0fe56bfe0b43357107f57fabc106ef627ef37f05b4cca4af0c07d0b5dccdbc1
font_01_sfnt_off00008105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8105 9816 bytes
SHA-256: 819508dd2f0e80367f3d42a56ad1c805638f65eb4b54794047d24d74eae9a1e3

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