Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6f57ebada0006b…

MALICIOUS

PDF

48.0 KB Created: 2020-10-18 00:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c87ab7687e70ea31885c618005f3a9f8 SHA-1: 3a07015e3166d8b3990ee0ef1b6fb95a6bf3c6ec SHA-256: 6a6f57ebada0006b69b162d6951c7e1cf3bcb065263f1cb5cfc4c191dd7b33c5
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://cctraff.ru/123?keyword=fifa+16+mod+offline+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f870af8ba56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f89cb832ed81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8b5e0730907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f8b5b93d47c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f887050cddc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86ffaae4e61.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/c7c5bb20c702.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/vedus-jolizo-gipomodena-rivuvoz.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/3404641.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.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/1/0439/3874/2440/files/sword_art_online_infinity_moment_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3866/1534/files/mp_9mm_magazine_base_plate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6415/4517/files/wujokisoguvadigubir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/prepositions_of_place_test_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6282/8449/files/radivakexekipofogeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24eb2c2-5a76-4914-8b65-0ba511d5d01d/5337298040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2891a7-19d2-4e30-bafc-ee0a5e9f61e7/jogekirekafubisoximitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e618df-a6c0-4443-8a69-d03b0c406354/dedizafubotedisoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/weluxupufunoxaripenutewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/27756503559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/64251319630.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_off00007022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 4744 bytes
SHA-256: a48346e27bb4f355b35191fb831e8de351687125ec9ddb6e786ac660f4317c24
font_01_sfnt_off0000801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 10724 bytes
SHA-256: 01a27ed6fff0909afca0ac51cc576648ef0ec9f09acc02700cdabdd9732c4efc
font_02_sfnt_off0000a4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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