Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a6e69cd5b86f15…

MALICIOUS

PDF

53.7 KB Created: 2020-10-03 14:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5af5f95edbd76bb01eb8614a8068c033 SHA-1: 69b1be6dcdfe9b26c9e6527b0c8fb3ba18297a59 SHA-256: f6a6e69cd5b86f1511dc53f853c518c2421b35deaecb3239baa3c3702b14d8ae
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=isotopic+abundance+questions+and+answers In PDF document text
    • http://files.stgeorgearizona.com/uploads/1/3/0/7/130775393/wetafobiwesekexevife.pdfIn PDF document text
    • http://files.gilsonns.com/uploads/1/3/1/3/131379541/sinabatadifelena.pdfIn PDF document text
    • http://ranusi.wineandca.com/uploads/1/3/1/3/131383837/9567064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/62943b60-9cd8-4672-9150-bceff7639b98/felefemetugev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfae145-e81f-46dd-a703-7177981f55f0/48879386908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f845e71e-13aa-4dbd-8e14-46071dae0e39/geworonazojikode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0ff3de-378a-4bac-a669-4ab8cfcd4cf7/zarovexamiwososeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e78f9a-6a98-4982-bf55-9d88cef3d44b/bejuzajosogudesevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/48217148216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/shurflo_4008_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6930/3701/files/group_of_pigs_born_in_one_farrowing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/goku_super_saiyan_5_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9493/6226/files/regular_show_pops_rap_battle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8971/8173/files/jeppesen_private_pilot_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/41455246910.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_off000089f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 5328 bytes
SHA-256: 4a4c5acd079f16c47b4723c3d5a786a4d7b535a174aff5c3faa7beb3e50ef4ba
font_01_sfnt_off00009c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C25 14712 bytes
SHA-256: 5cefc67cb51cddb1cccd6e2d5d11694b4235b279dd2471e405d3c3dcb3be34ea

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