Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a025f49ef8a5d4…

MALICIOUS

PDF

41.9 KB Created: 2020-11-08 22:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 2033c65ebf6a1bf4cb0a0b344f34fd80 SHA-1: 8b04ee8e0ca549046c6931b4f3a8a17ca8b2e629 SHA-256: 80a025f49ef8a5d47f8e8d83452c8eea3e2ce547f373321df2d87501bdb8d39a
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://traffmen.ru/123?keyword=career+cruising+login+school In PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/wifevibadopunax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8a8e407bf80.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/wepokivaw_wokeve.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/1852513.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/dotolirobaxom.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/5210236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f9d53dbf11bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006604.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006604.bin)
    • https://s3.amazonaws.com/kisimujuk/15987603407.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/linear_expressions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/1458166908.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/fexakadesabukelawojose.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://nudiwexepoju.files.wordpress.com/2020/11/43577352198.pdfIn PDF document text
    • https://rokirari.files.wordpress.com/2020/11/encountering_the_new_testament_3rd_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/chapter_12_dho_workbook_answers.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_off00006604.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 4968 bytes
SHA-256: 4041a9daa0ed0315d5d07ba00e6a68648947860cceb66a524d3ff9ca5e1f8451
font_01_sfnt_off000076db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 10396 bytes
SHA-256: 8c6a72543833f88b76cd25f405b161ef5e6467a49a32650fa18730151415ac1a