Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be4781ce120d2e9…

MALICIOUS

PDF

49.6 KB Created: 2020-10-17 01:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: daaa85f5ee1d2c5764c043570a70634f SHA-1: 5f1e5d789229034bcd5f6644ff0257359db68ef1 SHA-256: 7be4781ce120d2e9dcae5762a594bf76a75783b0a6b83c7283e0419b40840617
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://ttraff.me/123?keyword=root+device+android+7 In PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/540696.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/bafirop.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/5cca38bd-ee13-4a5d-8974-740b6d9f4b84/74399199366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032a39bd-054c-495b-919d-df665bb0f8c6/217793688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9fb0e6-0649-4059-a77c-5e7a2e85635c/10101148367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0f6756-1361-431f-b5cd-bfb19455be1b/kilokupagipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c624396-0068-4a65-8623-af40c214c01c/resas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef29803-256b-4c76-bd5c-4dd9421d0253/nigerugagom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd36ec58-3b75-4994-a6ac-c031c7304f36/41402091043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38cdf86-cece-4a81-a7df-3af54244c718/nuzuxaludanora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41fe0b6-0910-41a9-b934-a60b9a091a34/mudaboxiribawogib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a75c85-be52-4c16-92a5-d7ac72f7722d/jepekijulukewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9009/3239/files/fix_it_with_food_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/43157587484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/breville_avance_toaster_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7194/7161/files/28179025625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3972/6487/files/burda_free_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/17108240275.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_off000084b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B4 4872 bytes
SHA-256: 726ea06f5f8fbd53125207a0b9be24e1b75217efba4f4295daf0cfce36cc8fe6
font_01_sfnt_off00009561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9561 10832 bytes
SHA-256: b897ad2329a1cbd6368bf13c5efed8df0e0058078510fa6dee34412704c7ff35

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