Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f011813a51a1b3f…

MALICIOUS

PDF

39.2 KB Created: 2020-10-15 21:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ad2ae8773e6fbddd1e05a74f37dfb84f SHA-1: 5d04a9cae65c90d08517ed2bebd340ce3a973540 SHA-256: 2f011813a51a1b3f4180d3d3499b32a1700a1f8c3b0a77328c85b67531e8fa1f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdf.
  • 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://ggtraff.ru/123?keyword=chapter+8+sensation+and+perception+vocabulary+worksheet In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5544981.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/622580.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7146550.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/guwonajikawow-tededireri.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/2331321.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/bozokujasad.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/xupotepebisi.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4096223.pdfIn PDF document text
    • https://site-1038967.mozfiles.com/files/1038967/fexukigozigatiwa.pdfIn PDF document text
    • https://site-1039360.mozfiles.com/files/1039360/wilutapibadab.pdfIn PDF document text
    • https://site-1041600.mozfiles.com/files/1041600/wazipejejidusisomo.pdfIn PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/479061676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8756c1172ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f874caac9211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f873491b9a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f874c823c8f3.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/892e46ec-5ede-42ac-890c-fa5e81422d45/28433386110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2195681c-c1a3-4498-bf09-4c7e515470f5/busegaxufowegulizin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d33c7e0-c43f-4d71-9a8c-dc3c0bf25b7e/39864575213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2ccaf1-9ef4-492d-abd3-6d6eb6ea267d/nuwabekafawisadopafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ff8caa-be44-4b87-af0f-379a6eeb46c3/pipuroza.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_off000058e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E1 5716 bytes
SHA-256: e1d496a85e0ea50b67697fbc8c8ad3b8172c5d285e595d99345446d2dac550ad
font_01_sfnt_off00006c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C63 10120 bytes
SHA-256: 6019e9a5c3bf059cd88b02c1fae063d4aeaee55daf17dde04f658771dea0b78f