Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54fc7b103d0f0c3…

MALICIOUS

PDF

43.0 KB Created: 2020-11-07 03:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 12d04eeeb5e10f88e645a73965ce0f80 SHA-1: fb31f71cd518bc1cd6c20d7f22e78369ead9aa81 SHA-256: c54fc7b103d0f0c3b3920d318b4e1d298fd9e97b9c163842122c08a29b625c14
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://traffking.ru/123?keyword=kristin+seifert+decarlo+rick+astley In PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/fuxiwikakewa.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/gazife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/24440716298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1755c43-2799-4f9a-838c-dc3f58058f5c/94fbr_fl_studio_12.pdfIn PDF document text
    • https://zopovamodutu.files.wordpress.com/2020/11/jozopopeb.pdfIn PDF document text
    • https://desoputuwi.files.wordpress.com/2020/11/vuela_a_tu_libertad_alfonso_lara_castilla.pdfIn PDF document text
    • https://fogisunewada.files.wordpress.com/2020/11/3413958129.pdfIn PDF document text
    • https://galitedavaku.files.wordpress.com/2020/11/72736015109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d8da22-ec25-465a-8c68-23f763f3ceca/bullseye_estate_sales_dallas.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/zaxebuzipenofibolopoz.pdfIn PDF document text
    • https://woxelowobabi.files.wordpress.com/2020/11/rajilida.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_off000068c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5148 bytes
SHA-256: ad223978018845df2ea6ab31c2a3797a9518692ba8ee1e2db11ea5a96a32c673
font_01_sfnt_off00007a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5F 10908 bytes
SHA-256: 2a20e390fc5bea77ca4112ba762bda7a961f276cdb8ef62e08a5c37bf0c860ea

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