Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59c8e356e8e1bcf…

MALICIOUS

PDF

39.3 KB Created: 2020-10-31 12:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1b5438ff00a0b0435fb1248fc6c9fbca SHA-1: 12c63dbafa4e442e66f3084c4d7f8e03fa90a32d SHA-256: d59c8e356e8e1bcf5e25d3d715bde4ae6b83cebae6e61b289ea42b6e0f5a7b81
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/aws?keyword=family+guy+roadhouse+meme In PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/9961e8dbb5c20.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/3709424.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/wumodasajarubam.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/jadifipozekiw.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/09d6fdad50129.pdfIn PDF document text
    • https://mebogizudoredo.weebly.com/uploads/1/3/4/4/134472702/rabigozi.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/bisavilokutedalov.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://s3.amazonaws.com/subud/kindle_fire_hd_8_7th_generation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3e2592-061c-4042-9cfb-b3255286fe3a/82245563917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ef7eac-b278-472f-a1e2-e57f11b203b3/baldur_s_gate_descent_into_avernus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54225fa-3c15-4dcc-b81d-41d54a7e1b7e/luvelajeletobibojejigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93830a3-370f-405a-b497-003ae51732fa/nakipazuwojiwe.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_off00004e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6F 4992 bytes
SHA-256: f59b79b23d81f348bbe1dfd46ab1a33e4d0a92ca2962738794e9aa127d20319f
font_01_sfnt_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 10472 bytes
SHA-256: f2ad28a2f07e737a60ba97e95fcf988552c0412f6b9c96116c315e0cd937c0dc
font_02_sfnt_off00008257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8257 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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