Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60bc1a1808377c5…

MALICIOUS

PDF

49.8 KB Created: 2020-10-17 19:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 17cd539432f93e2017ee317e516c9ffc SHA-1: 6a97b9270fb8c05ff429e1419375f88e5589a604 SHA-256: f60bc1a1808377c58c69570cc326a56e160f1a8132b2a7af2291dbc055de8f5f
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=college+selection+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8a024904624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f888be248760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87d5daeb7bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8b016e77965.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/28fef585a7.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/6987841.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/715115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f894955edb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f89a846e7706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8748d06fa63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f874ce5c9176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f895354a1a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f877407a9275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f86f46e822b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f87351191f1a.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/luwulif_zojen_lefoxer_gukoruvifurof.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/jigaxewiwokoxuriwi.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/8566273.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/092e314c-fcec-4a7c-8a8c-ed170600ffd8/63341403721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723b2416-7548-4514-8dee-a7ebc6091b53/12525485197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75225f8-3251-42e4-b4d4-67434d952c1d/tufifaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c746125b-aa3c-4fe9-91de-451ab65857be/degitukebubajeteda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca536c9-9bcb-42f4-80c3-1a60f2b0c175/zudadoju.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_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 4912 bytes
SHA-256: 47480ab9f866b7a554427933b26310aa789d24eaf539f3bba830d5d188f023d7
font_01_sfnt_off0000968d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968D 10148 bytes
SHA-256: 15175532a35d6746280e762f3d66e609d040df93e8a3a69b78c68cd07a908d8f

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