Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9a6c21c8172124…

MALICIOUS

PDF

45.1 KB Created: 2020-11-08 13:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5624f12c370950b4c09d445848abfedc SHA-1: 0623a6ae802082bd7ba39e9ffc2d99b7cf34f92a SHA-256: fc9a6c21c8172124e969970a41737c6b8db523a9eaad45f904327f16d5366987
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=uc+apk+download+for+pc PDF link annotation
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/merazukofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f97ddbd3a2ee.pdfIn PDF document text
    • https://zulebesawezule.weebly.com/uploads/1/3/4/5/134589138/9ce9e4424851f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_5fa168928a392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vuvovugevuvo.files.wordpress.com/2020/11/46306918075.pdfIn PDF document text
    • https://pozajifu.files.wordpress.com/2020/11/pdf_to_jpg_converter_freeware_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19be865-b859-48f0-b24a-13dab3c74a55/jekegulutevolasafu.pdfIn PDF document text
    • https://pukatof.files.wordpress.com/2020/11/call_of_duty_zombies_2d_apk.pdfIn PDF document text
    • https://riroxoposej.files.wordpress.com/2020/11/calendario_mensual_2020_para_imprimir.pdfIn PDF document text
    • https://rokirari.files.wordpress.com/2020/11/63811568255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82e80fc-8861-4739-84a8-93720d9dc85d/ar_blue_clean_pressure_washer_parts.pdfIn PDF document text
    • https://kesewumulum.files.wordpress.com/2020/11/72070572117.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 5116 bytes
SHA-256: fcf1b3fd6a9ffb7974895a5823f2ae7e79a543736345015de2711b3c6f7a0bd1
font_01_sfnt_off00006e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 10688 bytes
SHA-256: f141a6d0b45ea45d9486f26f95e3dd321f56db859467337a27b47b6a7a893260
font_02_sfnt_off000092ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92EC 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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