Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7214bf76e74a00…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 03:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 105e80a8f8e5d8a4082157371f427f1d SHA-1: 7ce58a3afda2684ac6bd0e5e8b91b0e3a750195f SHA-256: cc7214bf76e74a00f07e76ea3653556e2afe0b71b300556b372372d7615bece6
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://gettraff.ru/aws?keyword=david+g+myers+psychology+12th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f9449646d6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5fa329a25d6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f86fc45d1b99.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/monopatijukawosape.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/52adb834-5b84-4b7c-8099-bb108b5c4bb2/bufugonobaxezex.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/what_county_is_winchester_ky_located_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fe65ee-f313-4286-948b-6c6f6c969173/23644167239.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/gearbox_design_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/roblox_card_generator_2019.pdfIn PDF document text
    • https://mipezutaxujo.files.wordpress.com/2020/11/49636059275.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bachelor_of_computer_science_books.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/dasobil.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/viruses_bacteria_worksheet_answers_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/6821797871.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_off000064c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 5912 bytes
SHA-256: b66fcc1ea79ecd49120b139d0bab477f1e4c7d088251f627bc0e9290c6dad0b7
font_01_sfnt_off000078dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 10816 bytes
SHA-256: 83fd47e32874c0777d50fc98b41199634725debb1610ea3d986293cb16257acf