Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bcdc00096c528c…

MALICIOUS

PDF

47.4 KB Created: 2020-10-25 07:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 15bf40fe6a1b9519ff55d6d9e1448205 SHA-1: f6ea48e016cdc16211de4624803878f1dda99b28 SHA-256: c6bcdc00096c528c7add8429bd67f1c288053987d87b27a235a5297cfe1ecb6b
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://ttraff.com/aws?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+d%25E1%25BB%258Bch+ti%25E1%25BA%25BFng+anh+sang+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t+file+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f8db1d323c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8778671c0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f9078d9003a8.pdfIn PDF document text
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/981c3943ee.pdfIn PDF document text
    • https://sububavujowiv.weebly.com/uploads/1/3/4/4/134460245/3627a85880eac5.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/1667602.pdfIn PDF document text
    • https://netaterosani.weebly.com/uploads/1/3/4/4/134438803/zozagozuv.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/6fec7bed6137d6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a03.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a03.bin)
    • https://uploads.strikinglycdn.com/files/abf7c231-198f-411f-bf33-9344f1b73c25/jexogapurefobafadajepefun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393e2ebc-5f76-4912-94f6-7007f298d58b/45972133402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8968a58c-28ee-4102-bb79-a0cbdacea247/72449509912.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/biodata_format_in_marathi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/catalogo_avon_campagna_4_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/kusufig.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/tetoxolujeludevenixanise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2cce10-8c6a-43b9-a3fb-0ed3199525f0/jumojesafadenezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1b9d47-e647-4030-8d38-ae3b034f7868/futurama_episode_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1efc0e6-43d7-4443-9ca6-3467c5663845/63455917713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6d9990-be9a-4b26-aea9-61b9aa7aa9a8/peworenexaredolozadukixin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2417/7093/files/curso_de_economia_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4390/4408/files/bts_idol_mp3_download_matikiri_wapka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0449/2438/files/60397788041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5421/7388/files/siwijanazikugolasezotofil.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 extracted file (font_00_sfnt_off00006a03.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 6364 bytes
SHA-256: 39de32dbf4c2c314a672f07728c81c33b39ca1e441695baec1a094de7cd51b02
font_01_sfnt_off00007e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 21632 bytes
SHA-256: 21b5f1ad5c2cd825997e99b31588298d847d610c984c7011e9cca0816fea27c1