Malicious PDF — malware analysis report

Static analysis result for SHA-256 e417c84af6ba4b50…

MALICIOUS

PDF

35.3 KB Created: 2020-10-02 05:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7b758c75ae71c3d6f17d5f97e5df2093 SHA-1: 66a91dc68dc3432e21a52a67a46184fbdc8a808e SHA-256: e417c84af6ba4b50609a0c74871cc6f60d5ca0c24b46c15d4eb60214c41828a5
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=alfredo+bosi+cultura+brasileira+temas+e+situa%25C3%25A7%25C3%25B5es+pdf In PDF document text
    • http://mesanopu.clonological.com/uploads/1/3/1/6/131606289/tuzezakon_nabiriwika.pdfIn PDF document text
    • http://files.hdskiandmanagement.com/uploads/1/3/1/3/131379591/7935096.pdfIn PDF document text
    • http://fikiw.daveleeart.com/uploads/1/3/1/3/131398405/jizoxaju-filasizogilul-pejijaxu-kawasesin.pdfIn PDF document text
    • http://files.nyhoneybuzz.com/uploads/1/3/1/6/131637194/b20f58.pdfIn PDF document text
    • https://site-1038627.mozfiles.com/files/1038627/nuxotukolutiv.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/kegabasalijo.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/1/0432/0467/3697/files/1729839625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9092/1622/files/periodic_table_and_periodicity_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/64139977307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/hip_hop_hairstyles_male.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3876/4967/files/avg_pc_tuneup_product_key_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/11456273565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/9345/5772/files/congolese_last_names.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_off000047b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47B6 5832 bytes
SHA-256: e05dbf65cd79e1d470a7182e848ed15d6af263939d58fe2bd0e36137b1297ac2
font_01_sfnt_off00005ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE3 11404 bytes
SHA-256: 60315a8f5e244962f38a5a7dc260760ccbba5a472ce7aa9d914ef76e1512f8eb