Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3f483a81712e86…

MALICIOUS

PDF

43.3 KB Created: 2020-10-02 14:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3bfaaccb3818fc595b5d0493be1ed7fc SHA-1: e4e5265b41bc3cc00403ab3430fd7f2ef81c0c24 SHA-256: 6e3f483a81712e86707a188f1ec7aaffff18b75c140364bf4cad4aac054a29df
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/strik?keyword=realcalc+scientific+calculator+apk+free+download In PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/60016461322.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/kuxukawa.pdfIn PDF document text
    • https://site-1039897.mozfiles.com/files/1039897/tonitebujas.pdfIn PDF document text
    • http://files.newenergycreator.com/uploads/1/3/2/6/132680860/6979756.pdfIn PDF document text
    • http://files.parlott.com/uploads/1/3/1/3/131379382/f8415f126b.pdfIn PDF document text
    • http://sajuxuda.wattsdidier.com/uploads/1/3/1/6/131607110/luxasojipux-ligilozu-xenamitalolu-tomudovad.pdfIn PDF document text
    • http://gewaseka.safetystreamlined.com/uploads/1/3/0/7/130740292/6288343.pdfIn PDF document text
    • http://files.christabolain.com/uploads/1/3/1/0/131070356/6724249.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/1/0480/8173/1748/files/electric_power_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/los_cuatro_pilares_de_la_educacion_delors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/rehabilitative_frame_of_reference_occupational_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/50252011062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/the_urge_band_tour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2115/1641/files/69629421815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0513/6024/files/best_beyblade_launcher_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/sewinebuzafuxosev.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_off00006c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5312 bytes
SHA-256: b9c5e3b348d67fe4647d591283da686fd6eaa399787f05daca1027949611aa9a
font_01_sfnt_off00007e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 9920 bytes
SHA-256: 97a6ed0e6c44d8844d6e9ea70030a6686aa655bd6be15ab0e1e7f3ba2b5c9fc3

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