Malicious PDF — malware analysis report

Static analysis result for SHA-256 889aa26ee2d45a5f…

MALICIOUS

PDF

39.7 KB Created: 2020-10-05 01:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f60cb432fefc0ace022d9abbc6c80b54 SHA-1: e406749c79b35a4d77a24fa395115bf36de4cc32 SHA-256: 889aa26ee2d45a5fedb808612e45a05fd3295b5eae7f94a10304dc95291d2d6f
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/strik?keyword=hazbin+hotel+rule+34 In PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/bofujojokolu.pdfIn PDF document text
    • https://site-1039476.mozfiles.com/files/1039476/64240546110.pdfIn PDF document text
    • https://site-1044076.mozfiles.com/files/1044076/sekiwotisaje.pdfIn PDF document text
    • http://pomozumu.garnseysferalacres.com/uploads/1/3/2/7/132741508/vudekaw_gikaveteguwixel_kumajubamoj_luzovabolegiwi.pdfIn PDF document text
    • http://rozixu.allisonknoxphotography.com/uploads/1/3/0/8/130874284/1031500.pdfIn PDF document text
    • http://mebexida.myspecialcrown.com/uploads/1/3/0/7/130740044/2262068.pdfIn PDF document text
    • http://datotil.shieldpatterns.com/uploads/1/3/1/3/131382028/7034078.pdfIn PDF document text
    • http://files.michelle-turner.net/uploads/1/3/2/3/132303359/gipuzutonarume_tejebolapig_lugoxaput_xuteniboki.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/1/0477/1636/8540/files/7631334141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1874/3719/files/como_tocar_acordeon_de_botones_en_sol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8402/9845/files/nevajadova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/interphone_f5mc_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24989e6-bbc0-4f74-8cc7-7aced886a92e/61819565362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341d12d9-802c-42a6-9344-c66623e3b30e/77812270388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c31efc-aa86-4d4e-bd88-0f24694ba09a/xenovulef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4fcf1e-3773-425d-a686-7a34fefd6aba/3802699878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c29bc7c-f87a-4511-9629-1dde84b82134/siniwivaliluxilujet.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_off00005ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 5000 bytes
SHA-256: ede116bbd5b95b39bff678e38c68e7f221ffdda9236d0b38836dc6c1064512af
font_01_sfnt_off00006ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 9972 bytes
SHA-256: b2a4a9a93eea9ce4a285b103767d694abfcbd12a360225572d4de9b485d7e3ac

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